a three letter word is bug. Three letter words ending with the letter g are bug and hug.
Dor
pester = bug
A three letter word for bother is bug
bug
bug One three-letter word meaning 'tease' is 'bug', as in, 'I wish my brother wouldn't bug me so much,' or 'His brother keeps bugging him,' An old word with the same meaning in English is 'fun', as in 'They're making fun of me,' which might once have been expressed (and still is in some regions) as, 'They're funning me,' Another now rarely-used word for tease is 'vex'.
The word bug fits here. It could be irk or vex.
bug
Hug
Bug
choler, enmity, temper, rankle
bug pug (a breed of dog)