rigidly restrained in style, taste, manner, etc.; simple, plain, or austere.
5.
causing discomfort or distress by extreme character or conditions, as weather, cold, or heat; unpleasantly violent, as rain or wind, or a blow or shock.
6.
difficult to endure, perform, fulfill, etc.:
a severe test of his powers.
7.
rigidly exact, accurate, or methodical:
severe standards.
Origin
1540-50; < Latinsevērus, or back formation from severity
1540s, from Middle French severe (12c., Modern French sévère) or directly from Latin severus "serious, grave, strict, austere" (see severity). From 1660s with reference to styles or tastes; from 1725 of diseases.