了

(completed action marker) / (modal particle indicating change of state, situation now) / (modal particle intensifying preceding clause)

to finish / to achieve / variant of 瞭|了[liao3] / to understand clearly

(of eyes) bright / clear-sighted / to understand clearly

unofficial variant of 瞭[liao4]

variant of 乙[zhe2]

"vertical stroke with hook" radical in Chinese characters (Kangxi radical 6) / see also 豎鉤|竖钩[shu4 gou1]