kerbed is kerb's Past Participle

kerb

US [kɜrb]
UK [kɜː(r)b]
  • n.(街道的)路边镶边石;井栏
  • Web路边石;路缘石;场外交易
Plural Form:kerbs  Present Participle:kerbing  Past Participle:kerbed  
n.
1.
(街道的)路边镶边石
2.
井栏
na.
1.
“curb”的变体