inconvenient (adj.)

late 14c., "fit, suitable, proper; affording accommodation; opportune, favorable," from Latin convenientem (nominative conveniens), present participle of convenire "to come together, meet together, assemble; unite, join, combine; agree with, accord; be suitable or proper (to)," from assimilated form of com "with, together" (see con-) + venire "to come" (from a suffixed form of PIE root *gwa- "to go, come").

Meaning "personally suitable to ease of action or performance" is from late 15c. Sense of "at hand, easily accessible" (1849) is marked in OED as "Ireland and U.S."

c. 1400, "harm, damage; danger; misfortune, affliction," from Old French inconvenience "misfortune, calamity; impropriety" (Modern French inconvenance), from Late Latin inconvenientia "lack of consistency, incongruity" (in Medieval Latin "misfortune, affliction"), abstract noun from inconvenientem (see inconvenient). Sense of "impropriety, unfitness; an improper act or utterance" in English is from early 15c. Meaning "quality of being inconvenient" is from 1650s.