Meaning
Coolness, a cooling relief; figuratively soothing comfort ('aankhon ki thandak', the coolness of the eyes, a beloved sight).
See it in the verse
Thandak in Iqbal’s couplets
Jis se jigar-e-laala mein thandak ho wo shabnam
Daryaon ke dil jis se dahel jaayein wo toofan
Daryaon ke dil jis se dahel jaayein wo toofan
To the tulip's heart he is the dew that cools it; to mighty rivers he is the storm that makes their hearts tremble.
Courage · Justice · Selfhood
Jis se jigar-e-lala mein thandak ho wo shabnam
Dariyaon ke dil jis se dahal jayen wo toofan
Dariyaon ke dil jis se dahal jayen wo toofan
To be the dew that cools the heart of the tulip — and the storm that makes the hearts of rivers tremble.
Courage · Leadership · Love