soft spot
[noun]
Synonyms: appetite, fondness, inclination, liking, taste, weakness, Achilles' heel

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Contrasted words: impregnability, invulnerability, invincibility
Related Idioms: heel of Achilles, weak link (or point), weak link in the chain
Related Words: vulnerability, vulnerableness, weakness, chink, loophole

[TahlilGaran] English Synonym Dictionary ▲

soft spot noun
have a soft spot for sb to feel a lot of affection for someone, often without knowing why:
She'd always had a soft spot for her younger nephew.

[TahlilGaran] Advanced Learner's Dictionary ▲