But Johnson and others say, it has been
formed "by contraction from _sithence_, or _sith thence_, from _sithe_,
Sax."--_Joh. Dict._

23. THAN, which introduces the latter term of a comparison, is from the
Gothic _than_, or the Anglo-Saxon _thanne_, which was used for the same
purpose. 24. THAT, when called a conjunction, is said by Tooke to be
etymologically the same as the adjective or pronoun THAT, the derivation of
which is twice spoken of above; but, in Todd's Johnson's Dictionary, as
abridged by Chalmers, THAT, the _conjunction_, is referred to "_thatei_,
Gothic;" THAT, the _pronoun_, to "_that, thata_, Gothic; _thaet_, Saxon;
_dat_, Dutch."

25. THEN, used as a conjunction, is doubtless the same word as the
Anglo-Saxon _Thenne_, taken as an illative, or word of inference.

26. "THOUGH, _allow_, is [from] the imperative Thaf, or Thafig, of the verb
Thafian or Thafigan, _to allow_."--_Tooke's Diversions_, Vol. i, pp. 111
and 150.

27. "UNLESS, _except, dismiss_, is [from] Onles, the imperative of Onlesan,
_to dismiss_."--_Ib._

28. WHETHER, a corresponsive conjunction, which introduces the first term
of an alternative, is from the Anglo-Saxon _hwaether_, which was used for
the same purpose.

29. YET, _nevertheless_, is from "Get, the imperative of Getan, _to
get_."--_Tooke_.

SECTION IX.--DERIVATION OF PREPOSITIONS.

The following are the principal _English_ Prepositions, explained in the
order of the list:--

1. ABOARD, meaning _on board of_, is from the prefix or preposition _a_ and
the noun _board_, which here means "_the deck_ of a ship" or vessel.
_Abord_, in French, is _approach, arrival_, or a _landing_.

2. ABOUT, [Sax. Abutan, or Abuton,] meaning _around, at circuit_, or
_doing_, is from the prefix _a_, meaning _at_, and the noun _bout_, meaning
a _turn_, a _circuit_, or a _trial_. In French, _bout_ means end; and
_about, end_, or _but-end_.

3. ABOVE, [Sax. Abufan, Abufon, A-be-ufan.] meaning _over_, or, literally,
_at-by-over_, or _at-by-top_, is from the Saxon or Old English _a, be_, and
_ufa_, or _ufan_, said to mean "_high, upwards_, or _the top_."

4. ACROSS, _at cross, athwart, traverse_, is from the prefix _a_ and the
word _cross_.

5. AFTER, [Sax. AEfter, or AEftan,] meaning _behind, subsequent to_, is, in
form, the comparative of _aft_, a word common to seamen, and it may have
been thence derived.

6. AGAINST, _opposite to_, is probably from the Anglo-Saxon, Ongean, or
Ongegen