noun肿块,疙瘩;隆起处;碰撞(声)
verb碰,撞;碰上,撞上;偶然遇见
nouna round raised area on your body where you have hit it
nouna small part on something flat that is higher than the rest
nounthe action or sound of something hitting a hard surface
verbto hit somebody or something when you are moving
verbto hit a part of your body against something hard
verbto meet somebody by chance