tasteless
1 bland, boring, dull, flat, flavourless, insipid, mild, stale, tame, thin, uninspired, uninteresting, vapid, watered-down, weak
2 cheap, coarse, crass, crude, flashy, garish, gaudy, graceless, gross, impolite, improper, indecorous, indelicate, indiscreet, inelegant, low, naff (Brit. slang) rude, tacky (informal) tactless, tawdry, uncouth, unseemly, vulgar
1 appetizing, delectable, delicious, flavoursome, savoury, scrumptious (informal) tasty
2 elegant, graceful, refined, tasteful