Webster's Revised Unabridged Dictionary -- Volume AB

-- Again and again, more than once; often; repeatedly.

-- Now and again, now and then; occasionally.

-- To and again, to and fro. [Obs.] De Foe.

Again was formerly used in many verbal combinations, as, again-witness, to witness against; again-ride, to ride against; again-come, to come against, to encounter; again-bring, to bring back, etc.

A·gain" (?), A·gains" (?), prep. Against; also, towards (in order to meet). [Obs.]

Albeit that it is again his kind.
Chaucer.

A·gain"buy` (?), v. t. To redeem. [Obs.] Wyclif.

A·gain"say` (?), v. t. To gainsay. [Obs.] Wyclif.

A·gainst" (?; 277), prep. [OE. agens, ageynes, AS. ongegn. The s is adverbial, orig. a genitive ending. See Again.]

1. Abreast; opposite to; facing; towards; as, against the mouth of a river; -- in this sense often preceded by over.

Jacob saw the angels of God come against him.
Tyndale.

2. From an opposite direction so as to strike or come in contact with; in contact with; upon; as, hail beats against the roof.

3. In opposition to, whether the opposition is of sentiment or of action; on the other side; counter to; in contrariety to; hence, adverse to; as, against reason; against law; to run a race against time.

The gate would have been shut against her.
Fielding.