harmless

形容词 harmless:

1. not causing or capable of causing harm
2. not injurious to physical or mental health
   同义词：innocuous
3. not producing any toxic effects
4. unlikely to harm or disturb anyone
   同义词：innocuous
5. not threatening to life or health; not malignant
   同义词：nonmalignant

1. I made a harmless remark to some guy at the bar and he swung at me.
   在酒吧里我向某个家伙说了句无恶意的话，他就向我打了一拳。
2. Causing no harm; harmless.
   无恶果的; 无害的
3. This snake is harmless.
   这条蛇是无毒的。
4. The bomb blast killed several harmless passers-by.
   炸弹爆炸使几个无辜行人受伤。

harm.less

adj.（形容词）
Incapable of causing harm.
不会造成伤害的
Free from loss or legal liability:
没有受到损失或免于法律责任的：
例句：
Under the agreement, I would be held harmless if the other parties defaulted.
通过协定如果其他当事人不出庭的话我将免于承担法律责任

【引伸】
harm.lessly
adv.（副词）
harm.lessness
n.（名词）