隙 - crevice, fissure, discord

gap; opening; room; space

gap; opening; aperture; crevice; crack; chink; space

to exploit a gap (in attention, security, etc.); to catch off guard

to wait for an opportune moment; to bide one's time; to see one's chance

to watch for an unguarded moment

potential space

vacant space; aperture; gap; opening

draft; draught; cold air entering through the crack of a door or window

one must constantly be on one's guard with ...; one cannot be too careful of ...

gap; opening; crevice; crack

porosity

niche market