252 The Loom of Language Romance languages other than French render TH by T, RH by R and Y by I, as in the Spanish words fotografia, teatro, diarrea, sintoma Many words of Greek origin can be recognized at sight by their prefixes, of which the following are specially important. Of the examples given, the first of each pair is literary, the second a product of the new technical humanism. amphi- both or around as in amphitheatre^ amphibious a- or an- not as in amnesty, amorphous ana- back) again, as in anachronism^ anabolism anti- against as in antithesis^ antiseptic apo- away as in apostasy^ apogamy auto- by itself as in autocrat^ auto-erotic dia- through as in diagonal^ dia-magnetic dys- bad as in dysgenic. dyspepsia ec-, ex- from, out of as in exodus^ ecdysi*. endo- within as in endogenous^ endometnum epi- upon as in epigram. epidiascope eu- good as in eulogy. eugenic. hemi- half as in hemisphere, hemicycle hetero- different as in heterodox, heterodyne homo- same as in homophone, homosexual hyper- above as in hyperbole, hypertrophy hypo- below as in hypothesis, hypophosphate iso- equal as in isosceles, isomer kata- dozun as in catastrophe, catalysis meta- after as in metaphysics, metabolism. neo- new as in neologism, neon palaeo- old as in palaeography, palaeolithic pan- all as in pantheism, panchromatic para- beside as in paradox. parameter pen- around as in periphrasis, periscope poly- many as in polytheism, polydactyly pro- before as in prologue, prognosis proto- first as in protocol, protoplasm pseudo- false as in pseudonym, pseudopodium syn-, sym- together as in synchronous, symbiosis. To these we should add the numeral prefixes mono- (i) as monogamy, di (2), tn- (3), tetra- (4), penta (5), hexa- (6), in tripod, tetrahedron, pentagon, hexagon; hepta- (7) as in heptameter, octo- (8), as in octopus and octagon* deka- (10), as in decalogue, kilo- (1000) in kilometer or hlogram. One of the foregoing prefixes, ex- or ec- is like its Latin equiva- lent and is not diagnostic. So also is pro- The only outstanding Greek suffixes are -ic or -ics in dialectic and mathematics, with the derivative -ical and -ism, e g in theism. The last exhibit in the language museum