'unevenly-logged' originates from English, formed from the prefix 'un-' meaning 'not' + 'even' meaning 'level, uniform' + the adverbial suffix '-ly,' modifying 'logged' (past participle of 'log'), where 'log' originally meant 'a heavy piece of wood' and later 'to record.'

'unevenly-logged' developed as a hyphenated compound in modern English from the phrase 'unevenly logged' (adverb + past participle), with 'logged' coming from Middle English 'logge/logge(n)' (origin uncertain) and the verb sense 'to record' arising via 'logbook' from nautical practice of using a 'log' to measure a ship’s speed.

Initially, 'log' referred to a piece of wood; over time it gained the sense 'to enter in a logbook/record.' The compound 'unevenly-logged' thus came to describe things either harvested irregularly (forestry) or recorded inconsistently (data).