أَطَارَ means “to make something fly,” from the hollow-yāʾ root ط ي ر. In contrast, طَارَ means “to fly.” Thus the derived Form IV may change a verb's transitivity as well as its form.
CategoryForm
Active perfectأَطَارَ
Active imperfectيُطِيرُ
Verbal nounإِطَارَةٌ
Active participleمُطِيرٌ
Passive perfectأُطِيرَ
Passive imperfectيُطَارُ
Passive participleمُطَارٌ
Imperativeأَطِرْ
Prohibitionلَا تُطِرْ
مُطِيرٌ denotes the agent causing flight; مُطَارٌ denotes what was made to fly.