Carefully, closely, with close attention; rigorously. Cf. narrow, adj. 4a.

By bringing the eyes or mind into close proximity with an object or matter; with close attention or investigation.

In an inquisitive or observant manner, esp. so as to scrutinize someone or something deeply. Now chiefly with reference to a scrutinizing gaze.

In various senses, in which closely, adv. is now the ordinary word.

Concisely; precisely, exactly.

In a scrutinous manner.

In or to a minute degree; with great or absolute precision or exactness.

in a probing manner; intimately; inquisitively.