boundless

/ˈbaʊndləs/
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If you describe something as boundless, you mean that there seems to be no end or limit to it. 无限的

adjective [原级] 无限的;无边无际的

His reforming zeal was boundless. 他的改革热情是无穷尽的。

后缀: less 【adjective】 表示缺乏或没有某种特性 - indicating the absence or lack of a particular quality 原词: boundless 是通过后缀 【less】 构成的派生词
bound(边界, 范围) + less(较少的) → 无边无际的
单词造句: