The word 'specify' originates from the Late Latin verb 'specificare', meaning 'to mention particularly'. This Latin term is built upon 'species', which evolved from the Proto-Indo-European root spek- meaning 'to observe'. The core logic of the word is rooted in the act of looking closely to identify a particular kind or class. Over time, the meaning shifted from the visual act of observing a distinguishing feature to the verbal act of stating something precisely, making it distinct from other possibilities. The suffix '-ify' (from Latin '-ficare') adds the sense of 'making' or 'causing', thus forming a verb that means 'to make something distinct by stating its particular details'.

Structure: spec (look, kind) + ify (verb suffix: to make) 'spec' is from Latin 'specere' (to look at, observe) and later 'species' (appearance, kind, sort). 'ify' is a verb-forming suffix from Latin '-ficare', meaning 'to make' or 'to do'.