gullible

The word 'gullible' is a relatively modern English formation, first appearing in the early 19th century. It is constructed from the now-archaic verb 'gull,' meaning to deceive or cheat, which itself likely originated from the even older noun 'gull' for a fool or dupe—a term possibly linked to the bird's perceived simplicity. The suffix '-ible,' of Latin descent via Old French, is productively attached to verbs to create adjectives denoting a passive quality or susceptibility. Thus, the literal construction "capable of being gulled" perfectly captures the modern abstract meaning of being easily tricked or too willing to believe.

Structure: gull (to deceive) + ible (capable of being) - gull: From the verb 'gull' (archaic, meaning to deceive or trick), likely of English origin, possibly from 'gull' meaning a dupe or fool. Its functional role is the core semantic root. - ible: A suffix of Latin origin (-ibilis), forming adjectives meaning "capable of being, fit for, worthy of." Its functional role is a derivational suffix indicating susceptibility.