decollate

First attested in 1599; borrowed from Latin dēcollātus, perfect passive participle of dēcollō (“to behead”) (see -ate (verb-forming suffix)), from dē- (“of, from”) + collum (“neck”) + -ō.

First attested in 1967; from de- + collate.

Borrowed from New Latin dēcollātus, see Etymology 1 and -ate (adjective-forming suffix) for more.