KanjiJLPT N1
Flip

flip, turn over, wave, flutter, change (mind)

Mnemonic

A hawk turns sharply and its feathers Flip inside out, revealing foreign script on the underside. Each feather flips to show the same word in a different language — the whole bird is a living translator, reversing meaning mid-flight with every flip of its wings.
Additional thoughts
The turn of the bird plus feathers flipping inside out captures both physical reversal and translation — flipping meaning from one language to another. Picture each feather as a two-sided flash card.
Quick recall
A bird turns and its feathers Flip inside out, translating hidden meaning mid-flight.

Details

The keyword for 翻 is flip. This kanji conveys the idea of turning something over, reversing, or flipping — whether physically, as in fluttering or waving in the wind, or figuratively, as in changing one's mind or retracting a previous statement. It carries a sense of sudden reversal or transformation, suggesting something that turns completely to its opposite side. The character is often associated with translation as well, since translating involves "flipping" meaning from one language into another.
On'yomi
ほん、はん
Kun'yomi
ひるがえ.る、ひるがえ.す