'ehasaan' is also written as 'ehasaaN' (with a nasal N instead of the n being pronounced)
nekii bhii kare aur phir ehasaan bhii maane
ham-saa ko_ii us shahar meN paagal na milegaa
1) ehasaanaat - plural of 'ehasaan'
2) ehasaan_faraamosh - ungrateful
3) ehasaan_mand - grateful