Being able or likely to do harm.
The definition of touch and go refers to an uncertain situation where an outcome is not clear and could change any minute.
Not safe; dangerous.
To an extreme:
Used as an intensive:
Involving death or calling for the death penalty:
Fraught with danger or harm:
Causing grief, pain, or anguish:
The definition of serious is showing deep thought, not joking, or a situation that requires careful thought.
Unsparing, harsh, or strict, as in treatment of others:
Find another word for life-threatening. In this page you can discover 26 synonyms, antonyms, idiomatic expressions, and related words for life-threatening, like: dangerous, hazardous, threatening, touch-and-go, unsafe, deadly, mortal, capital, grave, grievous and serious.