shamus

Etymology
Said to be from the Irish name Séamus, on account of many American police officers being of Irish descent.

Pronunciation

 * Homophones: Séamus (of -ā-/-eɪ-/ pronunciation)
 * Homophones: Séamus (of -ā-/-eɪ-/ pronunciation)
 * Homophones: Séamus (of -ā-/-eɪ-/ pronunciation)
 * Homophones: Séamus (of -ā-/-eɪ-/ pronunciation)

Noun

 * 1)  A private detective; originally, a policeman or police detective.