• not know
To have no knowledge or understanding of a person, object or fact.
• be unable to; cannot
To not have certain knowledge, function or skill.
• have no experience of; have never experienced
To have no experience of doing something.
• only care about
To disregard everything except for a certain thing.
• be not sure; may
To say something by guessing or assuming something one is not sure of.
• will never know; cannot imagine
To be incredible beyond description.
• not care; does not matter
To not care.
• not realize
To do or say something without even realizing it.
• not feel; not realize
To not feel.
• fail to do; would not do
To fail to do something one should.