serious
To a high degree.
To a very high degree.
To a high degree (often for emphasis).
Could possibly become serious.
Especially serious.
To a very high and worrying degree.
To a moderate degree.
Extremely serious and not joking at all (emphatic).
Entirely and genuinely not joking.
Completely and genuinely not joking.
Extremely serious (emphatic).
Completely and genuinely not joking, often used for emphasis.
Used to say that a problem or illness is not bad.
Bad enough to justify a particular action.
Used to describe a state of being bad or dangerous.
To change to a state of being bad or dangerous.
To change to a state of being bad or dangerous (more informal).
To appear bad or dangerous.
To give the impression of being bad or dangerous.
To sound as if a situation is bad or dangerous.
To continue to be in a bad or dangerous state.
To not be joking.
To have an expression that is not joking.
To have a tone of voice that is not joking.
To stop joking and adopt a serious manner.
To continue to not be joking.
To make an effort to continue to not be joking.
To suddenly stop joking and adopt a serious manner.
To gradually stop joking and adopt a serious manner.
Indicates who or what is affected by the serious situation.
Genuinely intending to do something.