Learn Turkish: Müşteri odunsu esansı almadan duramadı. - The customer could not help but buy the woody essence.

This structure uses the negative converb -madan (without doing) followed by duramamak (to be unable to stop or stand). Literally, it translates to could not stand without buying. In English, this matches the psychological inability of not being able to help but do something.

Could I use edemedi instead of duramadı in this sentence?

Yes, almadan edemedi would mean exactly the same thing. Both duramamak and edememek are used with the -madan or -meden suffix to express this concept. Duramamak just gives a slightly stronger feeling of being physically or mentally unable to hold oneself back.

How is the word odunsu formed?

It comes from odun (wood) and the suffix -su, which is a vowel-harmony variant of -msı or -ımsı. This suffix is added to nouns or adjectives to mean similar to or -ish. Therefore, odunsu translates to woody or wood-like.

Why does esansı take the accusative -ı suffix here?