bajar
- to drop, to fall, to lower, to let down, to take down, to come down, to go down, to reduce (prices), to ebb (of tides), to lower, to bow (the head), to go down, to descend
menguar (dícese de la marea)- to decline, to decrease, to diminish, to lessen, to wane
decaer
- to decline, to decay, to deteriorate, to weaken, to flag
disminuir
- to lower, to reduce, to decrease, to lower, to drop, to fall