IPA: /ˈflæŋkər/
KK: /ˈflæŋkər/
A person or thing that is positioned on the side, especially in a military or sports context, often to provide support or protection.
The coach decided to use a flanker to create more space on the field for the main players.
Flanker → The word 'flanker' is derived from the verb 'flank' (from Middle English 'flanken', meaning to be at the side of) combined with the agentive suffix '-er' (meaning a person who). A flanker is a person or thing that is positioned at the side or flank of something else.
Think of someone who is positioned 'at the side' ('flank') of a group — that's what a flanker does.