词根词缀：olig-, oligo-
【来源及含义】Greek: prefix; scanty, little, meager, tiny, infrequent; abnormally few or small
【相关词根词缀】Related "few, small, less, little" word units: micro-; mini-; mio-, meio-; nano-.
【同源单词】oligacanthous, oligandrous, oliganthous, oligarch, oligarchic, oligarchical
词根词缀：pneo-, -pnea, -pneic, -pnoea, -pnoeic, -pneo
【来源及含义】Greek: air, wind; breathing
【相关词根词缀】 Word units related to breath and breathe: hal-; pneumato-; pneumo-; psych-; spiro. Cross references of word groups that are related, directly or indirectly, to: "air, wind": aello-; aeolo-; aero-; anemo-; atmo-; austro-; flat-, flatu-; phys-; pneumato-; turb-; vent-; zephyro-.