To write the Greek Small Letter Eta With Psili And Oxia And Ypogegrammeni symbol ᾔ on keyboard using ALT codes; ALT+8084, just hold down the ALT key while typing the alt k♓ey code 8084. You have to use the numeric keypad of your keyboard. If you don not have numeric keypad, hold down the Fn and ALT keys while typing the al♒t code number.