0 a large, rectangular container with a handle, for carrying clothes and possessions while travelling -- （旅行用的）手提箱
Will you keep your eye on my suitcase while I go to get the tickets?
He is very fastidious about how a suitcase should be packed.
A toothbrush in a bathroom cabinet, or a supermarket, or a living room, or a suitcase, or a bin, has a physical/material context.
The event of approaching a suitcase is very complicated visually.
I do not recognize suitcases and then detect motion.
