Meaning

noun someone who risks losses for the possibility of considerable gains

noun someone who dives (into water)

noun hand tool consisting of a stick with a rubber suction cup at one end; used to clean clogged drains

originEtymology tree English plunge Proto-Indo-European *-yósder. Proto-Italic *-āzijos Latin -āriusnom. Latin -āriusbor. Proto-Germanic *-ārijaz Proto-West Germanic *-ārī Old English -ere Middle English -ere English -er English plunger From plunge + -er.

Etymology from Wiktionary, CC BY-SA 3.0