To growl, as an angry or surly dog; to gnarl; to utter grumbling sounds.

To speak crossly; to talk in rude, surly terms.

The act of snarling; a growl; a surly or peevish expression; an angry contention.

To entangle; to complicate; to involve in knots; as, to snarl a skein of thread.

To embarrass; to insnare.

A knot or complication of hair, thread, or the like, difficult to disentangle; entanglement; hence, intricate complication; embarrassing difficulty.

Tangle.

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To form raised work upon the outer surface of (thin metal ware) by the repercussion of a snarling iron upon the inner surface.

A snarl is a facial expression, where the upper lip is raised, and the nostrils widen. It usually indicates hate or pain.

See Birdnest.

suggested no adverse response level. Maximum dose or concentration that on current understanding is likely to be tolerated by an exposed organism without producing any harm.

Suggested No Adverse Response Level. The concentration of a chemical in water that is expected not to cause an adverse health effect.

make a snarling noise or move with a snarling noise; "Bullets snarled past us"

Snarl is the name of five different fictional characters in the various Transformers universes.