Parsing the Quasi-Construct Example

Al-Munādā: Vocative Types and Rules

يَا طَالِعًا جَبَلًا!
Translation: O climber of a mountain!
يَا: vocative particle.
طَالِعًا: accusative quasi-construct vocative, active participle.
جَبَلًا: accusative object of the participle “ṭāliʿ”.

Unlike an iḍāfa, “ṭāliʿan” retains tanwīn. The complement “jabalan” functions as an object, not a genitive second term.