na-adjective, noun which may take the genitive case particle 'no', noun
tasteless; flavorless
Describes food or drink that lacks flavor. Often used in negative evaluations.
This soup is tasteless; it needs more salt.
na-adjective, noun which may take the genitive case particle 'no', noun
uninteresting; dull; dry; insipid
Figurative use for things lacking interest, excitement, or character. Often appears in the compound 無味乾燥 (むみかんそう, 'dry and insipid').
See also: 無味乾燥
His lecture was dull, and the students were bored.
無味 (written with a similar kanji pattern) means 'tasteless' or 'flavorless', not 'meaningless' like 無意味.
Compound of 無 (mu, 'without') and 味 (mi, 'taste'). The figurative sense developed naturally from the literal meaning.