PTBer 4.b:18[2] :בגין דאנא תשיש ואנא קרי שמע ומתנמנם‏ :
See the entire entry for nwm vb. to sleep

PTBer 4.b:18[2] :בגין דאנא תשיש‏ : because I am feeble
See the entire entry for tšyš adj. weak