autonomy, independence

success / success in life, achievement in the world

succeed / be successful in life

sex, gender / (grammar) gender

key (tool for opening or locking something) / key; clue (important fact for solving something) / lock

(computing) key / (music) key

key

independent, sovereign, autonomous / voluntary, on one's own initiative

Short for 自主練習 (jishu renshū).

voluntary practice by oneself (as opposed to mandatory group practice)