'disinclination' originates from Latin, specifically the word 'disinclinationem,' where 'dis-' meant 'apart' and 'inclinationem' meant 'a leaning or tendency.'

'disinclinationem' transformed into the French word 'désinclination,' and eventually became the modern English word 'disinclination' through Middle English.

Initially, it meant 'a lack of leaning or tendency,' but over time it evolved into its current meaning of 'reluctance or unwillingness.'