This question is about suru-verbs, verbs made from a noun and the verb suru (for ex: 鼓 + する). I am familiar with the potential form of suru being 出来る, then suru-verbs potential become Xしえる or Xしうる or Xせる. How would you conjugate suru-verbs into the honorific and humble forms? I know なさる is the honorific form and 致す is the humble form of suru.

I took a couple guesses...

鼓する > 鼓なさる

鼓する > お鼓しになる

  • According to this upload.wikimedia.org/wikipedia/commons/6/68/… honorific would be お + stem + なさる can anyone verify?
    – Koden
    Oct 15, 2016 at 23:55
  • 2
    The potential form of suru-verbs is Xできる, not Xしえる etc, which have a different meaning from Xできる. 鼓する is only found in kanbun and 鼓なさる or お鼓しになる are practically not used.
    – user4092
    Oct 15, 2016 at 23:57
  • I have seen about 101 sites that will disagree with Xできる being the potential form of a suru-verb
    – Koden
    Oct 16, 2016 at 0:08
  • Aside from terminology, what's important is that ◯しえる is different from ◯できる and that the conjugation like 書く → 書ける share the same meaning as ◯できる, not ◯しえる.
    – user4092
    Oct 16, 2016 at 0:23
  • so what is the difference between Xしえる and Xできる?
    – Koden
    Oct 16, 2016 at 0:27

2 Answers 2


plain: 利用する
honorific: ご利用になる
humble: 利用させて頂く、利用致します



I don't really hear single-kanji-suru-verbs conjugate into honorific or humble forms except 信じられる or rarely 信じなさる (honorific). If you dare to want humble versions, I'm afraid you have to use 信じ申し上げる.

As for two-kanji versions, I hear both 信頼される and 信頼なさる evenly. The humble version 信頼いたす is common this time.

  • It is for the sake of completeness, I am creating an app for conjugation of japanese verbs
    – Koden
    Oct 16, 2016 at 0:29
  • That's a very difficult job, you won't be able to avoid some unpractical combinations.
    – user4092
    Oct 16, 2016 at 6:44

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