嘱 is a bound form (b.f.) that cannot stand alone as a word. It appears in compounds like 嘱咐 (zhǔfu, to urge / tell earnestly) and 嘱托 (zhǔtuō, to entrust). The core meaning is to earnestly instruct, advise, or entrust someone to do something. It carries an authoritative or caring tone, unlike neutral verbs like 告诉 or 建议. Common collocations include 叮嘱 (to enjoin repeatedly) and 医嘱 (doctor's advice).