| stalk(verb, draw, follow, extend, trace) |
| tail(verb, draw, follow, extend, trace) |
| track(verb, draw, follow, extend, trace) |
| turn up(verb, expression, phrasal verb, determine, see) |
| uncover(verb, determine, see, follow, catch) |
| unearth(verb, determine, see, follow, catch) |
| vanquish |
| baffle(verb, cross, frustrate, blank, thwart) |
| balk(verb, cross, frustrate, blank, thwart) |
| be on to |
| beat down(verb, expression, phrasal verb, cross, frustrate) |
| beat the system(verb, expression, idiom, cross, frustrate) |
| bedog(verb, draw, follow, extend, trace) |
| beg |
| blank(verb, cross, frustrate, thwart, baffle) |
| bring up the rear(verb, expression, idiom, draw, follow) |
| burn |
| bury(verb, cross, frustrate, blank, thwart) |
| cast down(verb, expression, phrasal verb, cross, frustrate) |
| cause setback(verb, expression, cross, frustrate, blank) |