āo xiàn
to cave in
hollow
sunken
depressed
āo tū
bumpy
uneven
slotted and tabbed joint
crenelation
āo
a depression
indentation
concave
hollow
āo cáo
recess
notch
groove
fillister
Jiǎ Píng wā
Jia Pingwa (1952-), Chinese novelist
āo bǎn
an engraved printing plate
gravure
intaglio
material printed using gravure (e.g. postage stamps)
āo kēng
concave depression
crater
āo jìn
concave
a concavity (lower than the surrounding area)
a depression
hollow
dented
shān āo
mountain cave, hole, recess etc
āo wén
die (printing, metalwork etc)
zhōng yāng āo
fovea centralis (depression in the macula retina, most sensitive optic region)
āo tū xíng
in and out shape
crenelated
wā
variant of 窪|洼[wa1]
(used in names)
āo pò pí
bark of tulip tree (TCM)
Cortex Liriodendri
āo hén
dent
indentation
notch
pitting