430
od, dog, sum, sun, cup, cur, cut, fix, whiz_.
EXCEPTIONS.--We double the consonant in _abb, ebb, add, odd, egg, jagg, ragg, inn, err, burr, purr, butt, buzz, fuzz, yarr_, and some proper names. But we have also ab (_from_) and ad (_to_) for prefixes; and _jag, rag, in, bur_, and but, are other words that conform to the rule.
RULE III.--DOUBLING.
Monosyllables, and words accented on the last syllable, when they end with a single consonant preceded by a single vowel, or by a vowel after qu, double their final consonant before an additional syllable that begins with a vowel: as, _rob, robbed, robber; fop, foppish, foppery; squat, squatter, squatting; thin, thinner, thinnest; swim, swimmer, swimming; commit, committeth, committing, committed, committer, committees; acquit, acquittal, acquittance, acquitted, acquitting, acquitteth_.
EXCEPTIONS.--1. X final, being equivalent to ks, is never doubled: thus, from mix, we have _mixed, mixing_, and mixer. 2. When the derivative retains not the accent of the root, the final consonant is not always doubled: as, _prefer', pref'erence, pref'erable; refer', ref'erence, ref'erable_, or _refer'rible; infer', in'ference, in'ferable_, or _infer'rible; transfer'_, a _trans'fer, trans'ferable_, or _transfer'rible_. 3. But letters doubled in Latin, are usually doubled in English, without regard to accent, or to any other principle: as, Britain, _Britan'nic, Britannia_; appeal, _appel'lant_; argil, _argil'laus, argilla'ceous_; cavil, _cav'illous, cavilla'tion_; excel', _ex'cellent, ex'cellence_; inflame', _inflam'mable, inflamma'tion_. See Observations 13 and 14, p. 199.
RULE IV.--NO DOUBLING.
A final consonant, when it is not preceded by a single vowel, or when the accent is not on the last syllable, should remain single before an additional syllable: as, _toil, toiling; oil, oily; visit, visited; differ, differing; peril, perilous; viol, violist; real, realize, realist; dial, diali