Background
Blandish is a verb, but can also be used as a noun (blandishment). Defined as to act or speak in a flattering or coaxing manner, blandish has been used since the 14th century without changing meaning. 

Derived from the Latin word blandus (mild, flattering). One of the earliest uses of blandish is from the writings of Richard Rolle de Hampole, an English hermit, mystic, and religious writer of the 14th century. During his time, Richard Rolle de Hampole was a widely read English writer, and today, about 470 of his manuscripts still survive. Blandus also gave rise to the commonly used adjective bland (lacking strong features and therefore uninteresting). It appears that the definition of blandus was split, with blandish taking on the definition of flattering, while the mild sense of blandus became bland.

Sentence 
Since she wanted to go to camp so badly, Mina tried to blandish her mother by complimenting her style.

Synonyms
Cajole, coax 

Main source:
https://www.merriam-webster.com/dictionary/blandish#note-1

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