To be or become aware of (something); to perceive.
To have a conception of (something); to consider, to regard.
To seize or take (something); to take hold of.
To understand.
To be of opinion, believe, or think; to suppose.
To seize or take (a person) by legal process; to arrest.
To be apprehensive; to fear.
To anticipate (something, usually unpleasant); especially, to anticipate (something) with anxiety, dread, or fear; to dread, to fear.
To acknowledge the existence of (something); to recognize.
To take hold of (something) with understanding; to conceive (something) in the mind; to become cognizant of; to understand.
To discover, infer or figure out.
To study or size up, to check out (examine).
Social nous.
Suspicious behaviour; the act of loitering with intent.
Suspicious.