Answer: strictest

AnswerCrossword Clue
STRICTESTMost authoritarian
STRICTESTMost unwavering
STRICTESTMost unforgiving
STRICTESTLeast lenient
strictestDemanding that rules concerning behavior are obeyed and observed
strictestSTRICT, exact (precise (sharply and clearly defined or stated))
strictest(of a rule or discipline) Demanding total obedience or observance; rigidly enforced
strictest(of a person) Following rules or beliefs exactly
strictestExact in correspondence or adherence to something; not allowing or admitting deviation or relaxation