four feet / four-footed creature; quadruped

(mathematics) the four basic arithmetic operations; addition, subtraction, multiplication and division

side

idea, invention

相槌, 相鎚: hammer man to a swordsmith / 相槌: customary signals made during a conversation to indicate comprehension or attentiveness

同性愛: homosexuality, homosexual love

塵埃: dust, dirt, this drab world / 仁愛: benevolence, charity, love

合鍵: duplicate key, master key

純愛: pure love

最愛: beloved, emotionally close, dear