stiff
From LSJ
ἔγνω δὲ φώρ τε φῶρα καὶ λύκος λύκον → the thief knows the thief and the wolf knows the wolf, and thief knows thief and wolf his fellow wolf, set a thief to catch a thief
ἔγνω δὲ φώρ τε φῶρα καὶ λύκος λύκον → the thief knows the thief and the wolf knows the wolf, and thief knows thief and wolf his fellow wolf, set a thief to catch a thief
hard: P. and V. στερεός, Ar. and V. στερρός, V. στυφλός, περισκελής.
not moving easily: P. δύσφορος.
grow stiff or numb: see numb.
firm, stubborn: P. and V. σκληρός, αὐθάδης.
formal, ceremonious: P. and V. σεμνός.
difficult: Ar. and P. χαλεπός.