Japanese by Example
Learning through examples in manga

Don't underestimate your mother with 甘く見る

Idiom Explanation: Taking someone lightly with 甘く見る

Manga panel from 怪盗セイント・テール showing example of Don't underestimate your mother with 甘く見る.
怪盗セイント・テール » Volume 7 » Page 46

Meimi’s mother stops by Meimi’s room with a couple of movie tickets. She says she and Meimi’s father have already seen the movie, so she’s offering them to Meimi. She says the movie is very romantic, and suggests Meimi has someone she’d want to see it with.

芽美(めいみ):
「マ…　ママ知(し)って…」
“Mom, you knew...?”
ママ:
「ママを甘(あま)く見(み)ないことね」
“Don't underestimate Mom.”

Key Points

  1. 甘(あま)く見(み)る = “to underestimate / take lightly”

    • The literal image is to see someone as easy or harmless, so the idiom means to judge them too lightly

    • Here Mom is warning Meimi not to assume she is clueless or easy to fool

  2. ママを = the person being underestimated

    • The particle を marks who is being judged lightly: ママを 甘(あま)く見(み)ない

  3. 〜ないことね = firm advice with a warning tone

    • 〜ないこと turns the negative phrase into a rule-like statement: “make sure not to…”

    • Adding ね softens it into a knowing reminder, so it sounds like “Don’t go underestimating Mom, okay?” rather than a harsh order

  4. Family-register nuance: ママ

    • The mother refers to herself as ママ, which is natural in a parent-child conversation