ようものなら
if (someone) were to do something; if by any chance; if one dares to
N1
Meaning
if (someone) were to do something; if by any chance; if one dares to
Formation
Spoken Only
Writing Only
Verb (dictionary form) + ようものなら
Explanation
ようものなら is used to express a hypothetical condition that the speaker believes is dangerous, unacceptable, or disastrous.
It strongly implies that if the action were to happen, the result would be very bad, such as punishment, trouble, or serious consequences. Because of this nuance, it is often used in warnings, threats, or strong cautionary statements.
This grammar is mainly used in spoken Japanese with emotional emphasis, but it also appears in written dialogue.
Usage Notes
✔ Used for hypothetical actions
✔ Strongly implies negative outcome
✔ Often followed by:
怒られる
大変なことになる
許されない
❌ Not used for positive or neutral results
❌ Not used for realistic plans