forefinger
US /ˈfɔːrˌfɪŋ.ɡɚ/
UK /ˈfɔːrˌfɪŋ.ɡɚ/

1.
index
the finger next to the thumb; the index finger
:
•
He pointed with his forefinger to the map.
Il a pointé la carte avec son index.
•
She held up her forefinger to signal silence.
Elle a levé son index pour signaler le silence.