The word 'tubular' traces its lineage directly to the Latin tubus, meaning a pipe or tube, which itself may have obscure origins. The suffix -ulus was added to form tubulus, a diminutive meaning "a small tube". English then adopted this form, appending the adjectival suffix -ar (from Latin -aris) to create 'tubular', literally meaning "pertaining to or resembling a small tube". Its modern technical sense describes anything shaped like or constructed from tubes. The slang usage, originating in 1970s Californian surf culture, metaphorically compares the exhilarating, hollow space inside a perfect, crashing wave to a tube, extending the meaning to signify anything exceptionally exciting or excellent.

Structure: tub (pipe) + ul (diminutive/relating to) + ar (adjective-forming suffix) • tub: From Latin tuba (trumpet, war-trumpet; later, a tube or pipe). In this word, it signifies a hollow, cylindrical object. • ul: A Latin diminutive suffix (-ulus, -ula, -ulum), here indicating "relating to" or "characterized by". • ar: A Latin adjectival suffix (-aris), meaning "pertaining to" or "of the nature of".