1. (v. t.) To prop or support.

2. (n.) Undercurrent.

act for advance affirm afford support answer for appear for ascend attest authenticate back back away back off backpedal backtrack backtrail backwater bear bear out bear up bolster bolster up brace budge buoy up buttress carry certify champion change change place circle circumstantiate climb come after come last commission confirm corroborate countermarch cradle crutch cushion deputize descend document ebb elect endorse fall astern fall back fall behind flow follow fortify front for get behind get in behind get over give support go go around go back go backwards go into reverse go round go sideways gyrate hold hold up keep afloat keep up lag behind lend support mainstay maintain make sternway mount move move over nominate pillow pinch-hit for plunge probate progress prop prove ratify regress reinforce represent retrogress reverse revert rise rotate run run interference for second shift shore shore up shoulder side with sink soar speak for spin stand back of stand behind stand by stand in for stay stick by stick up for stir stream strengthen subside subsidize substantiate substitute for subvention support sustain take sides with trail trail behind travel underbrace undergird underlie underpin underset understudy upbear uphold upkeep validate verify vote wane warrant whirl