A word with two meanings though misuse could be lethal [closed]

I'm currently writing an article that includes two contexts of communication: effectiveness and competence. Incompetent people can misuse terminology all day and the ideas are effective and do technically work. However I'm looking for a word or term that has two or more meanings and the misuse of could lead to bodily harm or even death; this is to promote the idea of the aspect of competently communicating one's ideas.

What word if not used competently could end up leading to injury or death in a context that most people could understand with little-to-no explanation?

Does it have to be a single word?

Derek Bentley was convicted of the murder of a policeman in 1952 and hanged the following year. He and an accomplice, Christopher Craig, were burgling a warehouse and Craig was armed with a pistol. When the police cornered Bentley and Craig, Craig drew the gun. A policeman told Craig to give him the gun and Bentley allegedly responded, "Let him have it, Chris." Craig shot the policeman in the shoulder and later shot another policeman dead.

During the trial, the prosecution claimed that "Let him have it" meant "shoot him", whereas the defence claimed that, if Bentley had said those words at all, he meant "give the gun to him."

Bentley was subsequently posthumously pardoned in 1993 and his conviction quashed in 1998, because of a multitude of problems, not least Bentley's mental state, an apparently falsified confession and the trial judge failing to properly direct the jury.

This may not be exactly what you are looking for, but might work in the context.

inflammable

Many people see the "in" as a negative prefix, and believe anything marked inflammable is flame retardant. However, both flammable and inflammable have the same meaning:

...both mean "capable of being easily ignited and of burning quickly." This makes no sense to the Modern English speaker. In English, we think of in- as a prefix that means "not": inactive means "not active," inconclusive means "not conclusive," inconsiderate means "not considerate." Therefore, inflammable should mean "not flammable."

-Merriam Webster

Because of this, volatile or combustible materials are often labeled as "flammable" to avoid a potentially hazardous misinterpretation.

Here are some examples:

When replacing a water pump, one must be sure to get the timing right in order to avoid damaging the engine.

In this case 'the timing' could be misconstrued as the time of day, as opposed to the timing of the engine. This omission really can wreck an engine.

These snakes are not poisonous.

This is tangential to your purpose, but a precise statement using a word like 'poisonous', which people think is synonymous with venomous, could easily misinform a reader. [To be clear, being venomous is about your bite being toxic, being poisonous is about if you being bitten is toxic.]

Be sure to change the water in your fish tank bimonthly.

Poor fish, bimonthly means both twice a month and every other month. (biweekly has the same problem.)

One word with good potential here is oversight which can mean both supervision and omission. Thus it is important to ensure oversight of the process can mean keep an eye on it or ignore it.

Another simple example: "ensure all alarms and warning lights are set off at the end of the shift".

Wikipedia has a list of such autoantonyms which could prove instructive.

Doesn't translate in spelling - but does verbally:

"raise" vs "raze".

"Raise a barn" - means to errect/construct it

"Raze a barn" - means to burn it to the ground