From the Japanese tangled song ("Healing Incantation"), the lyrics go like
“傷を癒せ、運命の川”-Heal wounds, river of fate I don't understand why 癒せ is used
instead of a proper conjugation, is it a colloquial way of speaking? or is it
a form that isn't used a lot?
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2019-03-23T19:51:57.907
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2019-03-23T20:36:49.457
33410
question
grammar word-choice colloquial-language
Difference between 癒せ and 癒せる
癒せ is a regular conjugation. It is the imperative of 癒す, "to heal
(something)". Compared to commands using the て-form (which are often followed
by ください), the imperative sounds rough and can be very rude. For example:  
食べてください。Eat, please.  
食べろ。Eat!  
As for the conjugation:  
Godan-verbs: Change the last u into e. (行く -> 行け)  
Ichidan-verbs: Change the last u into o. (寝る -> 寝ろ)  
する and 来る become しろ and 来い (こい), respectively.  
For the negative conjugation (no matter if ichidan, godan or irregular), just
add な to the dictionary-form of the verb (来るな! Don't come!).

Edit: To fully answer the question in the title of your post - "癒せる" would be
the potential-form of 癒す, but here, it is really just the imperative that is
used.
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2019-03-23T20:16:18.277
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2019-03-23T20:36:49.457
2019-03-23T20:36:49.457
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answer