The Urdu lafz Khalish means anxiety, apprehension

Koi mere dil se pooche tere teer-e-neemkash ko
Ye khalish kahan se hoti, jo jigar ke paar hota
– Mirza Ghalib

Someone ask my heart how it feels about your half drawn arrow
This anxiety would not be there, if the arrow had been shot through my heart

Woh na aaye tou satati hai khalish see dil ko…
Woh jo aaye to khalish aur jawan hoti hain
– Sahir Hoshiyapuri

If she doesn’t come, this anxiety begins to trouble the heart
If she does come, the anxiety becomes even younger and stronger