Decreases (5)
'decreases' is the definition.
('lessen' can be a synonym of 'decrease')
This is all the clue.
(Other definitions for lessens that I've seen before include "dies down" , "Abates" , "Belittles" , "Disparages" .)
'decreases' is the definition.
(ebb is a kind of decrease)
This is the entire clue.
(Other definitions for ebbs that I've seen before include "Goes out like tide" , "Wanes" , "Flows back - declines" , "fades away" , "Subsides" .)
'decreases' is the definition.
(drop is a kind of decrease)
This is the entire clue.
(Other definitions for drops that I've seen before include "treatment for eyes" , "Relinquishes" , "Gives up" , "treatment for eye" , "tiny amounts of medication" .)
'decreases' is the definition.
(fall is a kind of decrease)
This is all the clue.
(Other definitions for falls that I've seen before include "suffers defeat" , "Goes down" , "Cascade" , "North Country force" , "American seasons" .)