achievement; result; success; a positive outcome from effort

Negative adverb used before verbs, adjectives, and other adverbs to indicate negation; also used as a bound-form prefix to form terms with opposite meanings

(bound form) exaggerated; boastful; empty or in vain, as in the term 功不唐捐 gōng​bù​táng​juān

To relinquish, abandon, or sacrifice (one's life, family, etc.)