From an unused root meaning to revolve; a turn, i.e. A season -- + fitly.
H655. ophen
[אֹ֫פֶן] noun [masculine] circumstance, condition (perhaps literally turning) only dual (or plural) suffix עַלאָֿפְנָיו = in (right) circumstances Proverbs 25:11 (compare Stron the passage, also OrelliSyn. d. Zeit u. Ewigkeit 38 f.).