井底之蛙

jǐng dǐ zhī wā

lit. a frog at the bottom of a well (idiom)

fig. a person of limited outlook and experience

井

jǐng

a well

底

dǐ

bottom; base

之

zhī

(possessive particle, literary equivalent of 的[de5])

蛙

wā

old variant of 蛙[wa1]