结晶
jié jīng · HSK 7
to crystallize
💎 结 form/tie + 晶 crystal = to form into crystal, crystallize
结 means to tie or form a result; 晶 is built from three 日 sun glyphs stacked together, meaning bright or crystal. Together they name the result that forms as crystals, hence crystallize or crystallization.
结 — silk radical 糸 + lucky 吉 (phonetic)
结 is a semantic-phonetic compound. The silk radical 糸 on the left signals the meaning, since the original sense was tying threads or cords into knots. The right side 吉 (jí) provides the sound. From the literal 'knot' it extended to figurative senses like 'bind,' 'conclude,' or 'form (a bond).'