noun, feminine/py.nɛz/plural: punaises
bug, stinkbug; true bug (a member of order Heteroptera); bedbug; tack, thumbtack, drawing pin; a worthless woman (a term of abuse)
From the feminine of punais (“having a foul odor”), from Vulgar Latin *pūtināsius, from Latin puteō + nāsus, based on nāriputēns.