'obtrusive' originates from Latin, specifically the word 'obtrudere,' where 'ob-' meant 'against' and 'trudere' meant 'to thrust.'

'obtrudere' transformed into the French word 'obtrusif,' and eventually became the modern English word 'obtrusive' through Middle English.

Initially, it meant 'to thrust against,' but over time it evolved into its current meaning of 'noticeable or prominent in an unwelcome way.'