The Obama administration reiterated emphatically on Wednesday that it viewed a complete freeze of construction in settlements on the West Bank as a critical step toward a peace accord between Israel and the Palestinians.

Speaking of President Obama, Secretary of State Hillary Rodham Clinton said, “He wants to see a stop to settlements — not some settlements, not outposts, not ‘natural growth’ exceptions.” Talking to reporters after a meeting with the Egyptian foreign minister, Ahmed Aboul Gheit, she said: “That is our position. That is what we have communicated very clearly.”

Mrs. Clinton’s remarks, the administration’s strongest to date on the matter, came as an Israeli official said Wednesday that the Israeli government wanted to reach an understanding with the Obama administration that would allow some new construction in West Bank settlements.

The Palestinian president, Mahmoud Abbas, is expected to focus on the issue of settlement expansion when he meets with Mr. Obama on Thursday in Washington. Mr. Abbas and other Palestinian leaders have said repeatedly that they see no point in resuming stalled peace negotiations without an absolute settlement freeze.

Mr. Obama and other senior American officials have called on the government of Benjamin Netanyahu, the leader of the right-wing Likud Party who became prime minister almost two months ago, to halt all settlement activity.

Some Middle East peace analysts in Washington interpreted Mrs. Clinton’s comments as a sign that the administration was determined to change Israel’s policy on settlements rather than accept a compromise.

Dan Meridor, the Israeli minister of intelligence, and other senior Netanyahu aides returned to Jerusalem on Wednesday from meetings in Europe with Mr. Obama’s Middle East envoy, George J. Mitchell, and other American officials. The purpose was to continue discussing issues raised in last week’s Netanyahu-Obama meeting, including Mr. Obama’s objections to settlement expansion.

Mr. Mitchell has been negotiating reciprocal measures with Israel’s Arab neighbors, in which they would take steps, like granting visas to Israeli citizens or allowing Israel to open trade offices in their capitals, in return for Israel’s action on settlements. But administration officials say the onus is on Israel to show progress. Almost 300,000 Israelis now live in settlements in the West Bank, excluding East Jerusalem, among a Palestinian population of some 2.5 million. Much of the world considers the 120 or so settlements a violation of international law.

Mr. Netanyahu says his government will not build any new settlements and will take down outposts erected in recent years by settlers without proper government authorization. But he insists that his government will allow building within existing settlements to accommodate what he terms “natural growth.”

Israel says it reached understandings with the Bush administration — some formal, some informal and some tacit — on building within settlements. For example, construction was limited in small outlying settlements but more tolerated in large ones in areas that Israel intends to keep under any deal with the Palestinians. “We want to work to reach understandings with the new administration” that are “fair” and “workable,” said the Israeli official. He was speaking on condition of anonymity because the issue was still under discussion.

But the tenor of Mrs. Clinton’s comments Wednesday indicated to some analysts that the Obama administration was unlikely to budge from its position, even at the risk of putting Mr. Netanyahu’s government into jeopardy.

“She is stripping away whatever nuance, or whatever fig leaf, that would have allowed a deeply ideological government to make a settlement deal that is politically acceptable at home,” said Aaron David Miller, a public policy analyst at the Woodrow Wilson International Center for Scholars. “They’ve concluded, ‘We’re going to force a change in behavior.’ ”

Within the Israeli government, however, there is a consensus that the ever-growing settler population must be accommodated.

Mark Regev, a spokesman for Mr. Netanyahu, said the final status of the existing settlements would be determined in negotiations with the Palestinians. “In the interim, normal life should be allowed to continue in those communities,” Mr. Regev said.

In an interview with Army Radio on Monday, Ehud Barak, the defense minister and leader of the center-left Labor Party, gave a hypothetical example of a family of four that originally moved into a two-room home in a settlement. “Now there are six children,” he said. “Should they be allowed to build another room or not?” He added, “Ninety-five percent of people will tell you it cannot be that someone in the world honestly thinks an agreement with the Palestinians will stand or fall over this.”

In an effort to show good will, Mr. Netanyahu and Mr. Barak have been underscoring their willingness to take down 22 small outposts that are illegal under Israeli law, and that were supposed to have been removed under the 2003 American-backed peace plan known as the road map. That plan specified that Israel should halt “all settlement activity (including natural growth).”

In the early hours of Wednesday morning, the police removed some sheds and a tent from two tiny outposts in the Hebron area. Another small outpost was demolished in the Ramallah region last week, but new shacks have already appeared there. None of the three outposts were on the list of 22, but the measures against them prompted furious reactions from the hard right.

Many religious Jewish nationalists say it is their right to settle in the biblical heartland of the West Bank, which they call Judea and Samaria. Other Israelis cite security for holding on to the areas captured in the 1967 war.

Mark Landler reported from Washington, and Isabel Kershner from Jerusalem.