MOLLIFY

to calm or soothe

to reduce in emotional intensity

cause to be more favorably inclined
SYN - appease, assuage, concilliate, gentle, pacify
"she managed to mollify the angry customer"

make more temperate, acceptable or suitable by adding something else
SYN - season, temper, make less rigid or softer

"Luckily he had a great deal of close friends that were able to mollify his sadness after the break up."

"The boy was a whirlwind of anger and required someone around to mollify his behavior."

"she was able to mitigate the situation by being able to mollify each individual student separately."