anhydrous

the word 'anhydrous' is a scientific term constructed from greek components to precisely describe a chemical state. the prefix 'an-' is a form of 'a-' denoting absence, derived from the greek negative particle. the core root 'hydr-' originates from the greek 'hydōr' (water), which itself traces back to the proto-indo-European root wed- (water, wet). the suffix '-ous', of latin origin, is commonly used in english to form adjectives. thus, the literal combination 'without water' directly and logically yields the modern chemical meaning of a substance lacking water, particularly in its crystalline form.

Structure: an (without) + hydr (water) + ous (adjective suffix) an- (from greek, meaning 'without', 'not'); hydr- (from greek 'hydōr', meaning 'water'); -ous (from latin '-osus', a suffix forming adjectives meaning 'full of' or 'having the qualities of').