IPA: /ˈbɪkərər/
KK: /ˈbɪkərər/
A person who often argues about small or unimportant things.
The bickerer couldn't stop arguing about where to eat dinner.
Bickerer → The word is formed from 'bicker' (of uncertain origin, possibly from Middle Dutch 'bickeren', meaning to quarrel or argue) and '-er' (meaning a person who). A bickerer is a person who engages in petty arguments or disputes.
Think of someone who is always 'quarreling' or 'arguing' — that's what a bickerer does.