Both meanings involve change, but they ask different questions.
FeatureTaʿdiyahTaṣyīr
QuestionTo whom is an action extended?What state does something enter?
Exampleأَحْفَرْتُ زَيْدًا نَهْرًاأَشْرَكْتُ النَّعْلَ
DiagnosticAdded participant or objectAcquired quality or state
The first means causing Zayd to dig; the second means fitting the sandal with a strap. Do not assign a causative interpretation to every Form IV verb automatically.
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Fifteen Semantic Properties of Form IV (Ifʿāl): From Causation to Responsiveness
Both meanings involve change, but they ask different questions.
FeatureTaʿdiyahTaṣyīr
QuestionTo whom is an action extended?What state does something enter?
Exampleأَحْفَرْتُ زَيْدًا نَهْرًاأَشْرَكْتُ النَّعْلَ
DiagnosticAdded participant or objectAcquired quality or state
The first means causing Zayd to dig; the second means fitting the sandal with a strap. Do not assign a causative interpretation to every Form IV verb automatically.