aus·tere 
(ô-stîr)
(ô-stîr)adj. aus·ter·er, aus·ter·est
1. Severe or stern in disposition or appearance; somber and grave: the austere figure of a Puritan minister.
2. Strict or severe in discipline; ascetic: a desert nomad's austere life. See Synonyms at severe.
3. Having no adornment or ornamentation; bare: an austere style.
[Middle English, from Old French, from Latin austērus, from Greek austēros.]
aus·terely adv.
aus·tereness n.