低低切切

in a low voice / whispered

low / beneath / to lower (one's head) / to let droop / to hang down / to incline

to cut / to slice / tangent (math)

definitely / absolutely (not) / (scoffing or dismissive interjection) Yeah, right. / Tut! / to grind / close to / eager / to correspond to / see also 反切[fan3 qie4]

urgently / eagerly / worried / (urge sb to) be sure to / it is absolutely essential to (follow the above instruction)