Grammar › N1 · 01 Conditions and hypotheticals
〜ようものなら: if so much as; the moment
N1 · 01 Conditions and hypotheticals
Warns that something bad will follow if a certain thing happens even slightly.
Verb volitional form (〜(よ)う) + ものなら. The result is always a bad or extreme outcome, and the speaker treats even a small action as risky. Different from plain 〜たら, which can lead to good results too.
Examples
うちの父は、約束に少しでも遅れようものなら烈火のごとく怒る。
My father flies into a rage if you are even a little late for an appointment.
上司に口答えしようものなら、すぐに怒鳴られるよ。
If you so much as talk back to the boss, you will be shouted at right away.