TermWhat it explains
KināyahReaching an intended quality through an associated meaning
TaʿrīḍSuggesting something obliquely rather than declaring it directly
ReinforcementStrengthening the attribution without necessarily excluding others
RestrictionExcluding a competing possibility in the context of the assertion
«مثلك لا يبخل» can powerfully convey the addressee's freedom from miserliness through kināyah. An appropriate contrastive context might add a restrictive implication. That does not make kināyah and restriction the same concept.