to become empty;  to be emptied
 to empty;  to vacate;  to evacuate
 striking (at something) and missing;  swing and a miss;  vain attempt
 racing (of an engine);  spinning one's wheels;  running idle;  fruitless effort;  going nowhere;  going round in circles
 putting on a brave face;  put-on cheeriness;  pretending one is fine;  show of courage;  bravado;  Dutch courage
 dry cough;  hacking cough;  intentional cough (i.e. to get someone's attention)
 deep-fried food (esp. chicken)
 completely empty (of a residence, etc.);  vacant;  body from which the soul has left;  corpse;  shed skin (of a snake, insect, etc.)
 bad (fictitious) bill;  empty promise
 bluffing;  bluster;  bravado
 making a fuss;  Much Ado about Nothing (Shakespeare)
 lacking cargo;  in ballast
 (unusually) dry rainy season
 traveling alone and with little luggage (travelling)
 heating a vessel without water in it;  heating an empty pan, kettle, boiler, bathtub, etc.
 bluffing;  bluster;  bravado
 flat broke;  stone broke;  penniless
 blank email (e.g. for signing up to an email list)
 blank (ticket);  unsuccessful lottery ticket
 tea served without sweets
 completely empty (of a residence, etc.);  vacant;  body from which the soul has left;  corpse;  shed skin (of a snake, insect, etc.)
 blank (ticket);  unsuccessful lottery ticket
 fictitious transaction;  paper transaction
 embossing;  inkless stamping
 clicking the shutter of a camera without taking a picture (because no film is loaded, or in order to advance the film)
 flat broke;  stone broke;  penniless
 blank (ticket);  unsuccessful lottery ticket
 fictitious transaction;  paper transaction
 utterly lacking (in ability);  hopeless;  useless;  poor
 empty (e.g. intermodal containers in the transport industry)
 tenpai with all potential winning tiles visible on table (impossible to win)
 dealt hand containing only 1-point cards (scoring combination)
 dealt hand containing only 1-point cards (scoring combination)
 empty string;  null string