لِزَيْدٍ مِتْرَانِ
Zayd has two metres.
The measure is known, but the thing measured is not. Two metres of what?
لِزَيْدٍ مِتْرَانِ حَرِيْرًا — Zayd has two metres of silk.
لِزَيْدٍ مِتْرَانِ خَيْطًا — Zayd has two metres of thread.
حَرِيْرًا or خَيْطًا removes the ambiguity in مِتْرَانِ and is tamyiz.
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لِزَيْدٍ مِتْرَانِ
Zayd has two metres.
The measure is known, but the thing measured is not. Two metres of what?
لِزَيْدٍ مِتْرَانِ حَرِيْرًا — Zayd has two metres of silk.
لِزَيْدٍ مِتْرَانِ خَيْطًا — Zayd has two metres of thread.
حَرِيْرًا or خَيْطًا removes the ambiguity in مِتْرَانِ and is tamyiz.