Morpheme
Dolphin
Type
free base
Denotation
carnivorous aquatic mammal
Etymology
Middle English delphyn; Latin delphīnus; Ancient Greek delphís
Evidence
dolphin, dolphinarium, dolphinese, dolphinet, dolphinfish, dolphining, dolphinkind, dolphinless, dolphinlike, dolphins, dolphinspeak
Notes
<n> does not double because the stress falls on the first syllable
modern <o> influenced by pronunciation of dauphin
dolphin and Delphinus are doublets
