拇指対向性 ぼしたいこうせい Also written おやゆびたいこうせい, 母指対向性 Meanings Noun ability to oppose the thumb; opposable thumb Kanji 拇 thumb. Read as ボ. 指 indicate 対 against. Read as タイ. 向 toward. Read as コウ. 性 nature. Read as セイ. Jinuma: Japanese Dictionary · Word lists