18.  PRO means For, Forth, or Forwards:  as, pro-vide, to take care for; pro-duce, to bring forth; pro-trude, to thrust forwards; pro-ceed, to go forward; pro-noun, for a noun.

19.  PRETER means By, Past, or Beyond:  as, preter-it, bygone, or gone by; preter-imperfect, past imperfect; preter-natural, beyond what is natural; preter-mit, to put by, to omit.

20.  RE means Again or Back:  as, re-view, to view again; re-pel, to drive back.

21.  RETRO means Backwards, Backward, or Back:  as, retro-active, acting backwards; retro-grade, going backward; retro-cede, to cede back again.

22.  SE means Aside or Apart:  as, se-duce, to lead aside; se-cede, to go apart.

23.  SEMI means Half:  as, semi-colon, half a colon; semi-circle, half a circle.

24.  SUB,—­which makes suf, sug, sup, sur, and sus,—­means Under, and sometimes Up:  as, sub-scribe, to write under; suf-fossion, an undermining; sug-gest, to convey under; sup-ply, to put under; sur-reption, a creeping-under; sus-tain, to hold up; sub-ject, cast under.

25.  SUBTER means Beneath:  as, subter-fluous, flowing beneath.

26.  SUPER means Over or Above:  as, super-fluous, flowing over; super-natant, swimming above; super-lative, carried over, or carrying over; super-vise, to overlook, to oversee.

27.  TRANS,—­whence TRAN and TRA,—­means Beyond, Over, To another state or place:  as, trans-gress, to pass beyond or over; trans-cend, to climb over; trans-mit to send to an other place; trans-form, to change to an other shape; tra-montane, from beyond the mountains; i.e., Trans-Alpine, as opposed to Cis-Alpine.

CLASS III.—­THE GREEK PREFIXES.

1.  A and AN, in Greek derivatives, denote privation:  as, a-nomalous, wanting rules; an-ony-mous, wanting name; an-archy, want of government; a-cephalous, headless.

2.  AMPHI means Two, Both, or Double:  as, amphi-bious, living in two elements; amphi-brach, both [sides] short; amphi-theatre, a double theatre.

3.  ANTI means Against:  as, anti-slavery, against slavery; anti-acid, against acidity; anti-febrile, against fever; anti-thesis, a placing-against.

4.  APO, APH,—­From:  as, apo-strophe, a turning-from; aph-aeresis, a taking from.

5.  DIA,—­Through:  as, dia-gonal, through the corners; dia-meter, measure through.

6.  EPI, EPH,—­Upon:  as, epi-demic, upon the people; eph-emera, upon a day.

7.  HEMI means Half:  as, hemi-sphere, half a sphere; hemi-stich, half a verse.