AUSTEREST

Adjective

austerest

superlative form of austere: most austere

Source: Wiktionary

AUSTERE

Aus*tere", Etym: [F. austère, L. austerus, fr. Gr. Sear.]

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.

Syn.

– Harsh; sour; rough; rigid; stern; severe; rigorous; strict.

Source: Webster’s Unabridged Dictionary 1913 Edition