Origin: Latin suffix -ous
Infelicitous has 3 different meanings across 1 category:
not appropriate in application; defective
"an infelicitous remark"
"infelicitous phrasing"
"the infelicitous typesetting was due to illegible copy"
marked by or producing unhappiness
"infelicitous circumstances"
"unhappy caravans, straggling afoot through swamps and canebrakes"
Unhappy or unfortunate.