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had clammed
  • past perfect of clam.

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

After some early success in interrogations, mainly by FBI agents, Zubaydah had clammed up.

From Los Angeles Times • Jan. 21, 2020

Irritatingly, by midnight — five minutes later — the unseen bird had clammed up.

From Washington Post • May 24, 2016

Internal Revenue had clammed up tight, since they are forbidden by law to discuss any details of tax returns.

From Time Magazine Archive

Kellner had clammed up, and when the now suspicious editor had tried to check Colquhoun's tale personally, Colquhoun had vanished.

From Cue for Quiet by Sherred, Thomas L.