THEREFOR
There*for", adv. Etym: [There + for. Cf. Therefore.]

Defn: For that, or this; for it.
With certain officers ordained therefore. Chaucer.

THEREFORE There"fore, conj. & adv. Etym: [OE. therfore. See There, and Fore, adv., For, and cf. Therefor.]

1. For that or this reason, referring to something previously stated; for that. I have married a wife, and therefore I can not come. Luke xiv. 20. Behold, we have forsaken all, and followed thee; what shall we have therefore Matt. xix. 27.

2. Consequently; by consequence. He blushes; therefore he is guilty. Spectator.

Syn.
— See Then.

THEREFROM
There*from", adv.

Defn: From this or that. Turn not aside therefrom to the right hand or to the left. John. xxiii. 6.

THEREIN
There*in", adv.

Defn: In that or this place, time, or thing; in that particular or
respect. Wyclif.
He pricketh through a fair forest, Therein is many a wild beast.
Chaucer.
Bring forth abundantly in the earth, and multiply therein. Gen. ix.
7.
Therein our letters do not well agree. Shak.