泳 is a Japanese kanji written with 8 strokes, listed here under the keyword “swim”. It is built from 水 (water) and 永 (eternity). In Remembering the Kanji by James W. Heisig it is frame 144.
On KumiJi Glyph Explorer, open the parts search and type “water” + “eternity”. 泳 is among the results, together with every other character containing the same shapes.
Open 泳 in the interactive kanji search
to expand every part down to its smallest pieces, add your own names and mnemonic stories,
or search for other characters by their parts.