A problem that is challenging to solve.
Used other than figuratively or idiomatically: see hard, nut, crack.
A situation, person, group, etc. which is difficult to overcome or deal with.
A place, opportunity, etc. to which it is difficult to gain entry.
An amount that is difficult to finance.
An intricate complication; a problematic difficulty; a knotty or tangled situation.
A slow-moving traffic jam.
A squabble.
A knot or complication of hair, thread, or the like, difficult to disentangle.
A growl, for example that of an angry or surly dog, or similar; grumbling sounds.
The act of snarling; a growl; a surly or peevish expression; an angry contention.
To be congested in traffic, or to make traffic congested.
To speak crossly; to talk in rude, surly terms.
To growl angrily by gnashing or baring the teeth; to gnarl; to utter grumbling sounds.
To become entangled.
To entangle; to complicate; to involve in knots.
To place in an embarrassing situation; to ensnare; to make overly complicated.
To form raised work upon the outer surface of (thin metal ware) by the repercussion of a snarling iron upon the inner surface.
To complain angrily; to utter growlingly.