openly; publicly; aboveboard (as opposed to 暗 àn secretly)

gun; firearm; rifle; any weapon or tool with a similar shape or function, such as a spear or a spray gun

easy to; used before a verb to show that an action is easy to perform

To avoid; to duck; to evade something or someone coming toward you.

It is difficult to defend against hidden attacks or underhanded schemes. This idiom is often used alongside 明枪易躲 míng​qiāng​yì​duǒ.