From WordNet (r) 3.0 (2006) [wn]:
insipid
adj 1: lacking taste or flavor or tang; "a bland diet"; "insipid
hospital food"; "flavorless supermarket tomatoes"; "vapid
beer"; "vapid tea" [syn: bland, flat, flavorless,
flavourless, insipid, savorless, savourless,
vapid]
2: lacking interest or significance or impact; "an insipid
personality"; "jejune novel" [syn: insipid, jejune]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Insipid \In*sip"id\, a. [L. insipidus; pref. in- not + sapidus
savory, fr. sapere to taste: cf. F. insipide. See Savor.]
[1913 Webster]
1. Wanting in the qualities which affect the organs of taste;
without taste or savor; vapid; tasteless; as, insipid
drink or food. --Boyle.
[1913 Webster]
2. Wanting in spirit, life, or animation; uninteresting;
weak; vapid; flat; dull; heavy; as, an insipid woman; an
insipid composition.
[1913 Webster]
Flat, insipid, and ridiculous stuff to him. --South.
[1913 Webster]
But his wit is faint, and his salt, if I may dare to
say so, almost insipid. --Dryden.
Syn: Tasteless; vapid; dull; spiritless; unanimated;
lifeless; flat; stale; pointless; uninteresting.
Insipidity