memoro

Memoro, memorare, memoravi, memoratum, first conjugation, from the adjective memor, "mindful". It takes a plain accusative of the thing told, and it will head an accusative and infinitive: memorant Romulum urbem condidisse, "they relate that Romulus founded the city".

The gerundive memorandus is the piece that survived. It means "to be brought to mind, worth recording", and English took the neuter memorandum straight off the page. The trap is the neighbouring verb. Memoro is outward-facing: you mention something to somebody. Memini is inward: you remember it yourself, it is defective with only perfect forms carrying present meaning, and it takes the genitive. Latin also has commemoro for recalling something publicly, which is the one English commemorate descends from.