stumble
stum.ble \'st*m-b*l\ \-b(*-)lin\ \-b(*-)l*r\ \-blin-le-\ vb or stum.bling
[ME stumblen, prob. of Scand origin; akin to Norw dial. stumle to s]tumble;
akin to OE stamerian to stammer 1a: to fall into sin or waywardness 1b: to
make an error : BLUNDER 1c: to come to a block to belief 2: to trip in
walking or running 3a: to walk unsteadily or clumsily 3b: to speak or act
in a hesitant or faltering manner 4a: to come unexpectedly : MEET {~ onto
the truth} 4b: to fall or move carelessly 1: to cause to stumble : TRIP
2: CONFOUND, PERPLEX - stumble n