IPA: /ˈsuːpər/
KK: /ˈswupər/
A person or thing that moves quickly downwards through the air, often in a sudden or dramatic way.
The swooper bird gracefully descended from the sky to catch its prey.
The word 'swooper' is derived from 'swoop' (of uncertain origin, possibly imitative of the sound made during a rapid descent) and the suffix '-er' (meaning a person who performs an action). A 'swooper' refers to a person or thing that swoops, typically in a quick or sudden manner.
Think of someone who 'swoops' down quickly — the '-er' indicates that this person is performing the action of swooping.