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Webster 1913 Edition

Adj.

[L.

stomachosus

angry, peexish. See

Stout; sullen; obstinate.

[Obs.]

With stern looks and

stomachous

disdain.

Spenser.

Adj.

Stout; sullen; obstinate. [Not in use.]

stomachous ‎(comparative more stomachous, superlative most stomachous)

(obsolete) Bitter, resentful.
- 1590, Edmund Spenser, The Faerie Queene, II.viii:
  nought againe / Him answered, as courtesie became, / But with sterne lookes, and stomachous disdaine, / Gaue signes of grudge and discontentment vaine [...].