Severe

Serious in feeeling or manner; sedate; grave; austere; not light, lively, or cheerful.

Very strict in judgment, discipline, or government; harsh; not mild or indulgent; rigorous; as, severe criticism; severe punishment.

Rigidly methodical, or adherent to rule or principle; exactly conformed to a standard; not allowing or employing unneccessary ornament, amplification, etc.; strict; -- said of style, argument, etc.

Sharp; afflictive; distressing; violent; extreme; as, severe pain, anguish, fortune; severe cold.

Difficult to be endured; exact; critical; rigorous; as, a severe test.

intensely or extremely bad or unpleasant in degree or quality; "severe pain"; "a severe case of flu"; "a terrible cough"; "under wicked fire from the enemy's guns"; "a wicked cough"