The (often spherical) end of the head of a hammer opposite the main hammering end.

To shape metal by striking it, especially with a peen.

(slang) Penis.

A short, soft, high-pitched sound, as made by a baby bird. / A feeble utterance or complaint. / The sound of a steam engine's whistle; typically shrill.

To make a soft, shrill noise like a baby bird. / To speak briefly with a quiet voice.

(intransitive) To look, especially through a narrow opening, or while trying not to be seen or noticed. / (intransitive) To begin to appear; to look forth from concealment; to make the first appearance.

A quick look or glimpse, especially a furtive one. / The first partial appearance of something; a beginning to appear.

(obsolete) A spot on a die or domino.

(Britain, slang) person.

(informal) A short or small person; a small object. / A kind of small marble in children's games. / (US, sports) A player in a sports league for very young children.