But is also derived from botan, which signifies to add, superadd, join or unite; as, in the old form of a deed, “it is butted and bounded as follows.”  Two animals butt their heads together.  The butt of a log is that end which was joined to the stump.  A butt, butment or a-butment is the joined end, where there is a connexion with something else.  A butt of ridicule is an object to which ridicule is attached.

    “Not only saw he all that was,
    But (add) much that never came to pass.”
                              M’Fingal.

To button, butt-on, is derived from the same word, to join one side to the other, to fasten together.  It was formerly spelled botan, boote, bote, bot, butte, bute, but.  It is still spelled boot in certain cases as a verb; as,

    “What boots it thee to fly from pole to pole,
    Hang o’er the earth, and with the planets roll? 
    What boots ( ) thro space’s fartherest bourns to roam,
    If thou, O man, a stranger art at home?”
                              Grainger.

    “If love had booted care or cost.”

A man exchanged his house in the city for a farm, and received fifty dollars to boot; to add to his property, and make the exchange equal.

Let presents the same construction in form and meaning as but, for it is derived from two radicals of opposite significations.  It means sometimes to permit or allow; as, let me go; let me have it; and to hinder or prevent; as, “I proposed to come unto you, but (add this fact) I was let hitherto.”—­Rom. 1:  13. “He who now letteth, will let until he be taken out of the way.”—­2 Thess. 2:  7.

=And= is a past participle signifying added, one-ed, joined.  It was formerly placed after the words; as, “James, John, David, and, (united to-gether_-ed_,) go to school.”  We now place it before the last word.

=Tho=, altho, yet.  “Tho (admit, allow, the fact) he slay me, yet (get, have, know, the fact) I will trust in him.” Yes is from the same word as yet.  It means get or have my consent to the question asked. Nay is the opposite of yes, ne-aye, nay, no.  The ayes and noes were called for.

I can pursue this matter no farther.  The limits assigned me have been overrun already.  What light may have been afforded you in relation to these words, will enable you to discover that they have meaning which must be learned before they can be explained correctly; that done, all difficulty is removed.