What most sharply distinguishes talwīḥ from ramz?

Taʿrīḍ, Talwīḥ, Ramz, Īmāʾ and Ishārah; the Rhetorical Force of Figurative Speech

• Talwīḥ always targets a quality and ramz always a referent
• Talwīḥ has many links; ramz few links with an obscure relation
• Talwīḥ always changes the addressee but ramz never does
• Talwīḥ forbids the literal meaning; ramz requires it