lacking flavour; tasteless
with no interesting or stimulating qualities; dull
We see so many insipid beauties made wives of, that could not have caught the particular fancy of any man that had any fancy at all — Charles Lamb
insipidity /-ʹpiditi/ noun
insipidly adv
insipidness noun
[French insipide from late Latin insipidus, from in-1 + Latin sapidus: see sapid]