gap; opening; break; interval; unguarded moment; carelessness
gap; opening; spare moment; interval; unguarded moment; carelessness
to exploit a gap (in attention, security, etc.); to catch off guard
chink in the armor (armour)
to watch for an unguarded moment
draft; draught; cold air entering through the crack of a door or window; cooling off of a relationship; draft of cold air between two persons
without any weak spot; watertight (e.g. reasoning); impeccable
one must constantly be on one's guard with ...; one cannot be too careful of ...
not busy; unengaged; being free; leisure
before one could; in no time at all; without a gap
closely; compactly; leaving no space
gap; opening; crevice; crack
spare moment; free time; interval; break