Severe (5)

'severe' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for acute that I've seen before include "Keen; severe" , "Sharp - sort of French accent" , "quick on the uptake" , "Sharp-pointed - keenly perceptive" , "Sharp like angle" .)
'severe' is the definition.
(I know that severe can be written as stern)
This is the entire clue.
(Other definitions for stern that I've seen before include "Strict, grimly serious" , "Hard - back" , "Back end of a ship" , "Inflexible; back" , "Stiff - back - not smiling" .)
'severe' is the definition.
(thesaurus)
This is all the clue.
(Other definitions for stiff that I've seen before include "Rigid, prim" , "cheat" , "Severe - conventional - dead body" , "Starched, rigid" , "Unyielding" .)
'severe' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for harsh that I've seen before include "Raucous - austere - bitter" , "Severe and disagreeable" , "Unpleasantly stern" , "Strict, unfair" , "Not relenting" .)
'severe' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for strict that I've seen before include "Demanding that rules are observed" , "Uncompromising in discipline" , "Severe and unyielding" , "Severe, stern" , "Harsh and severe" .)
'severe' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for drastic that I've seen before include "Grave" , "'Severe, extreme (7)'" , "Unsparing" , "Harsh, severe" , "Thoroughgoing" .)
'severe' is the definition.
(I know that severe can be written as austere)
This is all the clue.
(Other definitions for austere that I've seen before include "Harsh" , "Serious" , "Stern, grave" , "Grim - USA tree (anag)" , "Abstemious and grave" .)
'severe' is the definition.
(thesaurus)
This is all the clue.
(Other definitions for violent that I've seen before include "not peaceful either" , "Furious" , "Immoderate" , "Using excessive force" , "Hot-headed" .)