(a.) Capable of being proportioned, or made proportional; also, proportional; proportionate.

OK able acceptable admissible all right ample average barely sufficient better than nothing capable comfortable commensurate common competent corresponding decent due effective effectual efficacious efficient enough equal equal to fair fair to middling fairish fit fitted fitting good good enough goodish middling minimal minimum moderate no great shakes not amiss not bad not half bad not so bad okay passable plenty plenty good enough presentable pretty good productive proficient proper proportionable proportionate qualified respectable satisfactory satisfying so so substantial sufficient sufficient for sufficing suitable suited tidy tolerable unexceptionable unexceptional unimpeachable unobjectionable up up to up to snuff workmanlike