swallow
鴯 is a rare kanji that refers specifically to a swallow (the bird). Its meaning is narrow and concrete, without abstract extensions.
鴯 combines 而 (which likely provides the sound) with 鳥 (bird), forming a phono-semantic compound for a type of bird, specifically the swallow.
The left side 而 looks like a beak and a wing, and the right side 鳥 is a bird. Together they form a swallow, a bird known for its swift, beak-first flight.
For ジ, imagine a swallow swooping down to catch a tiny insect with a sharp 'ji' sound. The quick 'ji' cues ジ while the bird catches its prey.
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