Used attributively in compounds like bug spray; also used as a slang adjective meaning mentally unbalanced or erratic.
anti-insectesProduit ou dispositif destiné à repousser les insectes. She packed a bottle of bug repellent for the camping trip.
Elle a emporté un flacon d'anti-insectes pour le camping.
He went bug when he heard the news.
Il est devenu fou quand il a entendu la nouvelle.