abator

abator · noun¹

From abate (“to enter without right after the owner dies and before the heir takes over”) + -or. From Anglo-Norman.

abator · noun²

From abate (“do away with”) + -or. From Middle English, from Old French.

First known use, by meaning

• Mid 16ᵗʰ century. a person who, without right, enters into a freehold on the death of the last possessor, before the heir or devisee
• Late 16ᵗʰ century. one who abates, ends, or does away with a nuisance