Below are possible answers for the crossword clue Severe.
ACUTE
a mark (') placed above a vowel to indicate pronunciation
having or experiencing a rapid onset and short but severe course; "acute appendicitis"; "the acute phase of the illness"; "acute patients"
of critical importance and consequence; "an acute (or critical) lack of research funds"
extremely sharp or intense; "acute pain"; "felt acute annoyance"; "intense itching and burning"
having or demonstrating ability to recognize or draw fine distinctions; "an acute observer of politics and politicians"; "incisive comments"; "icy knifelike reasoning"; "as sharp and incisive as the stroke of a fang"; "penetrating insight"; "frequent penetrative observations"
ending in a sharp point
of an angle; less than 90 degrees
AUSTERE
Uadorned
Without ornamentation
practicing great self-denial; "Be systematically ascetic...do...something for no other reason than that you would rather not do it"- William James; "a desert nomad's austere life"; "a spartan diet"; "a spartan existence"
of a stern or strict bearing or demeanor; forbidding in aspect; "an austere expression"; "a stern face"
severely simple;
BAD
physically unsound or diseased; "has a bad back"; "a bad heart"; "bad teeth"; "an unsound limb"; "unsound teeth"
very intense; "a bad headache"; "in a big rage"; "had a big (or bad) shock"; "a bad earthquake"; "a bad storm"
not financially safe or secure; "a bad investment"; "high risk investments"; "anything that promises to pay too much can't help being risky"; "speculative business enterprises"
nonstandard; "so-called bad grammar"
below average in quality or performance; "a bad chess player"; "a bad recital"
not capable of being collected; "a bad (or uncollectible) debt"
Not good
feeling physical discomfort or pain (`tough' is occasionally used colloquially for `bad'); "my throat feels bad"; "she felt bad all over"; "he was feeling tough after a restless night"
very much; strongly; "I wanted it badly enough to work hard for it"; "the cables had sagged badly"; "they were badly in need of help"; "he wants a
HARSH
sharply disagreeable; rigorous; "the harsh facts of court delays"; "an abrasive character"
severe; "a harsh penalty"
unkind or cruel or uncivil; "had harsh words"; "a harsh and unlovable old tyrant"; "a rough answer"
unpleasantly stern; "wild and harsh country full of hot sand and cactus"; "the nomad life is rough and hazardous"
disagreeable to the senses; "the harsh cry of a blue jay"; "harsh cognac"; "the harsh white light makes you screw up your eyes"; "harsh irritating smoke filled the hallway"
of textures that are rough to the touch or substances consisting of relatively large particles; "coarse meal"; "coarse sand"; "a coarse weave"
STERN
severe and unremitting in making demands; "an exacting instructor"; "a stern disciplinarian"; "strict standards"
the rear part of a ship
of a stern or strict bearing or demeanor; forbidding in aspect; "an austere expression"; "a stern face"
the fleshy part of the human body that you sit on; "he deserves a good kick in the butt"; "are you going to sit on your fanny and do nothing?"
not to be placated or appeased or moved by entreaty; "grim determination"; "grim necessity"; "Russia's final hour, it seemed, approached with inexorable certainty"; "relentless persecution"; "the stern demands of parenthood"
severely simple;
United States concert violinist (born in Russia in 1920)