undercurrent
/ˈʌndəkʌrənt ˈअन्डकरन्ट्/ noun [C] undercurrent (of something) a feeling, especially a negative one, that is hidden but whose effects are felt प्रच्छन्न या गुप्त मनोभाव (विशेषतः नकारात्मक और हलके असर वाला)
I detect an undercurrent of resentment towards the new proposals.