noun, masculine/vɛʁb ɛ̃.pɛʁ.sɔ.nɛl/plural: verbes impersonnels
verbe impersonnel is masculine in French.
impersonal verb (verb that only conjugates itself in the third-person singular)
“"Pleuvoir" est un verbe impersonnel.” — "Pleuvoir" is an impersonal verb.
From verbe + impersonnel.