思索 しさく speculation #22,345 Meanings noun, takes する, transitive speculation; thinking; meditation Its kanji 思 シ · おも.う、おもえら.く、おぼ.す think 索 サク cord, rope, searching, inquiring In sentences Furigana 彼かれは思索しさくにふけっていた。 He lost himself in thought. #106492