sweeten

verbs

make sweeter in taste
dulcify, dulcorate, edulcorate, sweeten
is derived from
sweetener
is derived from
sweetening
is derived from
sweetening
antonym
sour
make sweeter, more pleasant, or more agreeable
"sweeten a deal"
sweeten
is derived from
sweetener
is derived from
sweetening
is a type of (narrower)
cause to change; make different; cause a transformation
"The advent of the automobile may have altered the growth pattern of the city"; "The discussion has changed my thinking about the issue"
alter, change, modify