jejuneness

noun

1. The state or quality of being insipid: blandness, innocuousness, insipidity, insipidness, vapidity, vapidness, washiness, wateriness. Informal wishy-washiness. See excite/bore/interest, taste/bad taste.
2. A lack of excitement, liveliness, or interest: asepticism, blandness, colorlessness, drabness, dreariness, dryness, dullness, flatness, flavorlessness, insipidity, insipidness, lifelessness, sterileness, sterility, stodginess, vapidity, vapidness, weariness. See excite/bore/interest.

The noun has 3 meanings:

Meaning #1: lacking and evidencing lack of experience of life
  Synonyms: callowness, juvenility

Meaning #2: the quality of being vapid and unsophisticated
  Synonyms: jejunity, tameness, vapidity, vapidness

Meaning #3: quality of lacking nutritive value
  Synonym: jejunity