to shake back and forth, to be agitated, to vibrate, tremble; to bubble up; to be afraid

bubble, bladder, balloon

baloon, bladder, bubble

bubble

ball, roll, bubble, something round

to make level, smooth, even; to adjust, regulate, put right; to tune (musical); to baste, join loosely

bottom, the depths; basis, foundation, level area

scales, standard, criterion, level

high-level

staff for measuring the water level in an irrigation well