strict; severe

(used to describe sb or sth that makes a very strong impression, whether favorable or unfavorable) terrible; intense; severe; devastating; amazing; awesome; outstanding; (of a person) stern; strict; harsh; shrewd; tough; (of an animal) fierce; (of a resemblance) striking; (of liquor or chili pepper) strong; (of bacteria) virulent

in a sharp, forceful voice

to do (sth) with rigor; rigorously

malicious spirit; devil

to practice strict economy (idiom)