grommet
n.
5< obs. Fr gromette (now gourmette), curb chain, bridle < gourmer, to curb, prob. < VL *grumus, throat6
1 a ring of rope or metal used to fasten the edge of a sail to its stay, hold an oar in place, etc.
2 an eyelet, as of metal or plastic, protecting an opening in cloth, leather, etc.