shí​zhǐ

index finger

食指 shí​zhǐ
index finger noun
the finger between the thumb and the middle finger

He pressed the shutter with the index finger of his right hand.

mouths to feed expression
a literary term referring to the number of people in a household to support

He has a large family to support, so he is under great financial pressure.

Frequency

Movie subtitles
1.67 per million appears in 1% of films
Written text
4.45 per million

Sources

Definitions
CC-CEDICT