faufiler

/fofile/
1.
verbInf1stPres

to slip through / weave through (a crowd or narrow space); to slip in or get in unnoticed; (figurative) to slip something into (a conversation)

Il a réussi à se faufiler dans la foule pour arriver devant.

He managed to slip through the crowd to get to the front.

2.
verbInf1stPres

to baste / tack (temporarily join fabrics by large or loose stitches before final sewing)

Il faut faufiler les tissus avant de les piquer à la machine.

You need to baste the fabrics before sewing them with the machine.