(uncountable) The condition of being insipid; insipidness. (countable) Something that is insipid; an insipid utterance, sight, object, etc.

What is insipidity?

1 : lacking in qualities that interest, stimulate, or challenge : dull, flat insipid prose. 2 : lacking taste or savor : tasteless insipid food.

What is the noun form of insipid?

insipidity or insipidness, nouninsipidly, adverb.