molecular

The word 'molecular' originates from the modern Latin term molecularis, which is built upon molecula, meaning "a small mass." Molecula itself is a diminutive of the Latin moles (a mass, barrier, or bulk), implying something of a vastly reduced scale. The suffix -aris (English -ar) was added to form an adjective. Thus, the term's literal logic progressed from the concept of a physical "mass" to its diminutive "tiny mass," and finally to the modern scientific sense of "pertaining to the smallest fundamental units (molecules) of a chemical compound."

Structure: molecul (small mass) + ar (adjective suffix) - 'molecul': From Latin molecula, a diminutive of moles (mass, bulk). It denotes a very small mass or particle. - 'ar': A Latin-derived suffix forming adjectives, meaning "of or pertaining to."