Sentence

私を甘く見るな。

(わたし)(あま)()るな。
Don't make little of me.
Sentence

世間を甘くみるな!

世間(せけん)(あま)くみるな!
Don't kid yourself.
Sentence

対戦相手を甘く見るな。

対戦(たいせん)相手(あいて)(あま)()るな。
Don't underestimate your opponent.