始業

(1)an aperture or hole that opens into a bodily cavity; "the orifice into the aorta from the lower left chamber of the heart"

(2)身体の腔に通じる孔あるいは穴

(3)a vacant or unobstructed space that is man-made; "they left a small opening for the cat at the bottom of the door"

(4)人工の空き、または障害のない空間

(5)the act of opening something; "the ray of light revealed his cautious opening of the door"

(6)何かを開ける行為

(1)