Without divergence

straight, in a straight line, straight ahead, undeviating, uninterrupted, right, unswerving, linear, straightaway, shortest, nonstop, through, in a bee line, as the crow flies, straight as an arrow, point-blank; see also straight 1.

Antonyms zigzag*, roundabout*, crooked. *

Frank

straightforward, outspoken, candid; see frank, honest 1.

With nothing or no one intervening

immediate, firsthand, unmediated, close, personal, primary, verbatim; see also literal 1.

To show the way

conduct, show, guide, steer; see lead 1.

To decide the course of affairs

regulate, govern, influence; see command 2, manage 1.

To teach

inform, instruct, give directions; see advise 1, teach 1.

To address

deliver, lecture, read; see address 2.

To aim

point, train, level, focus; see aim 2.

To command

order, bid, charge; see command 1.

To direct one's effort

strive, address oneself, focus; see apply (oneself), try 1, undertake.

To write directions on a letter or package

inscribe, label, designate; see address 1, mark 1, 2. See syn. study at command, manage.