Morpheme
Assassin
Type
free base
Denotation
ruthless killer, historically a fanatical Muslim sect
Etymology
French assassin or Italian assassino, assessino; Arabic ʔasāsiyyīn
Evidence
assassin, assassinate, assassinated, assassinatee, assassinates, assassinating, assassination, assassinative, assassinator, assassinatress, assassinatrix, assassinism, assassinlike, assassinous, assassins, assassinship, autassassinophilia, counterassassin, superassassin
Notes
<n> does not double because the stress falls on the second (not last) syllable
folk etymology links the word to Arabic ḥaššāšīn meaning “hash-user, low-life”