(idiomatic) to self-reflect, to give a serious thought

(idiomatic) to self-reflect, to give a serious thought

burden, impediment

Same as above

a carpal bone

(Japanese mythology) wife of 脚摩乳 (Ashinazuchi) and mother of 奇稲田姫 (Kushinadahime)

(shogi) repetition of the same moves

If one learns without thinking, one will be lost in his learning. That is, if one does not think about what one learns, he will not arrive at the truth of it.

a parallelogram

Alternative spelling of 平行四辺形 (“parallelogram”)