madcap

The madcap decided to jump off the bridge into the river for fun.

那个鲁莽的人为了好玩决定从桥上跳进河里。

Everyone warned him, but the young madcap ignored their advice and raced his car on the icy road.

每个人都警告他，但这个年轻的鲁莽之人无视了他们的建议，在结冰的路上飙车。

She was known as a madcap who would try any dangerous stunt without thinking twice.

她以鲁莽之人著称，会不假思索地尝试任何危险的特技。