ology, terminology, neologism,
phraseology, tautology, analogy, eulogy, apology, apologue, eclogue,
monologue, dialogue, prologue, epilogue, decalogue, catalogue, travelogue,
logogram, logograph, logo-type, logarithms, logic, illogical. (Moreover
you may have perceived in some of these words the kinship which exists in
all for the _loquy_ group--see (1) Soliloquy below.) Of course you
will discard some items from this list as being too learned for your
purposes. But you will observe of the others that once you know the
meaning of _ology_, you are likely to know the whole word. Thus from
your study of _conchology_ you have mastered, not an individual term,
but a tribe.

In _conchology_ only one element, _ology_, was really dubious at
the outset. Let us take a word of which both elements give you pause.
Suppose your thought is arrested by the word _eugenics_. You perhaps
know the word as a whole, but not its components. For by looking at it and
thinking about it you decide that its state is married, that it comprises
the household of Mr. Eu and his wife, formerly Miss Gen. But you cannot
say offhand just what kind of person either Mr. Eu or the erstwhile Miss
Gen is likely to prove.

Have you met any of the _Eu's_ elsewhere? You think vaguely that you
have, but cannot lay claim to any real acquaintance. To the dictionary you
accordingly betake yourself. There you find that Mr. Eu is of a family
quite respectable but not prone to marriage. _Euphony, eupepsia,
euphemism, euthanasia_ are of his retiring kindred. The meaning of the
_eu_ blood, so the dictionary informs you, is well. The _gen_
blood, as you see exemplified in gentle, general, genital, engender,
carries with it the idea of begetting, of producing, of birth, or (by
extension) of kinship. _Eugenics_, then, is an alliance of well and
begotten (or born).

Your immediate purpose is fulfilled; but you resolve, let us say, to make
the acquaintance of more of the _gens_, whose number you have
perceived to be legion. You are duly introduced to the following: genus,
generic, genre, gender, genitive, genius, general, Gentile, gentle,
gentry, gentleman, genteel, generous, genuine, genial, congeniality,
congener, genital, congenital, engender, generation, progeny, progenitor,
genesis, genetics, eugenics, pathogenesis, biogenesis, ethnogeny,
palingenesis, unregenerate, degenerate, monogeny, indigenous, exogenous,
homogeneous, heterogeneous, genealogy, ingenuous, ingenious