空 Stroke Order

idle clamor / to prattle

airspace

to fill a job vacancy / to fill in a blank (e.g. on questionnaire or exam paper)

air-raid shelter / antiaircraft dugout

ghost

night sky

outer space

abbr. for 空中小姐 / stewardess / air hostess / female flight attendant

to rise to the sky / to lift off / to levitate / liftoff

midair

astrospace / cosmic space

quiet and deserted

Xuankong Temple or Suspended Temple near Yanyuan in Shanxi

empty nest / a home where the kids have grown up and moved out

open / spacious

surface-to-air missile

to open an aperture / (extended meaning) to cut a way through / to open up a road

to hang in the air / suspended in midair / (fig.) uncertain

a common occurrence (idiom)

lit. to rush at thin air / fig. to miss one's aim / to have nothing to show for one's troubles

air drop / to drop supplies by air

to short-sell (finance)

to find the time to do sth

empty hand, empty fist (idiom); having nothing to rely on / unarmed and defenseless

to dig for thoughts (idiom); to search everything for an answer / to rack one's brains

neutral gear

to hollow out / to empty out / to use up / (finance) tunneling

make a clean sweep / carry off everything / put to sack (and pillage)

air force

a magnificent and unprecedented event (idiom)