Keen

beißend

(acrimonious, bitter, piercing)

bitter

(acrimonious, bitter, piercing)

gallig

(acrimonious, bitter, piercing)

heftig

(fierce, intense, vehement)

kühn)

daring

(showing a quick and ardent responsiveness or willingness)

leidenschaftlich

(showing a quick and ardent responsiveness or willingness)

scharf

(showing a quick and ardent responsiveness or willingness)

scharf

(sharp-edged)

scharfsinnig

(acute of mind)

scharfzüngig

(acrimonious, bitter, piercing)

schneidend

(of cold, wind, etc.: cutting, penetrating)

spitz

(acrimonious, bitter, piercing)

ungestüm

(fierce, intense, vehement)

vehement

(fierce, intense, vehement)

verwegen (temerarious)

(showing a quick and ardent responsiveness or willingness)