Austere

Part of speech: noun (n.)

1. Sour and astringent; rough to the state; having acerbity; as, an austere crab apple; austere wine.

2. Severe in modes of judging, or living, or acting; rigid; rigorous; stern; as, an austere man, look, life. From whom the austere Etrurian virtue rose. Dryden.

3. Unadorned; unembellished; severely simple.

Synonyms: Harsh; sour; rough; rigid; stern; severe; rigorous; strict.