ice-free

形容词 ice-free:

1. free of ice and open to travel

ice-free

adj.（形容词）
Free of ice and open to travel or navigation:
不冻的：不结冰的并可向旅游或航行开放的：
例句：
an ice-free channel in the river.
河流中不结冰的水道

Marked by a lack of obstructive ice:
无冰的：以没有阻碍性冰为特征的：
例句：
a three-month ice-free period during the summer.
夏季三个月的无冰期