she has (Gain)ed weight but is not (say)ing it which means, she is denying the fact.
GAINSAY~ GHANTE SEY...we say ghante sey when we want to deny sumthing..so GAINSAY=GHANTE SEY= DENY
to "GAIN"(say profit) you have to "SAY" something(challenge something)
u have something to gain by saying lies.
Gai(gay's) say (open speech) is disputed/challenged/not accepted in our society.
SAY a girl puts up or GAINS aa lot of weight.She will be DENIED to follow her usual heavy diet
if a GAY says some thing then it is contradicted by others.
when somebody (gain)s weight they [deny] (say)ing it obviously.
gainsay = a say need gain is always weak commenti.e contradictory.