ce_.

14. Hyphenate compounds of _god_ when this word forms the second
element; _sun-god_, _war-god_, _godsend_, _godson_.

15. Hyphenate compounds of _half_ and _quarter_; _half-truth_,
_quarter-circle_, _half-title_, but on account of difference in meaning
of _quarter_, _quartermaster_, _headquarters_.

16. These prefixes

_ante_- _infra_- _re_-
_anti_- _inter_- _semi_-
_bi_- _intra_- _sub_-
_co_- _pre_- _super_-
_demi_- _post_- _tri_-

are ordinarily joined to the word with which they are used without a
hyphen, except when followed by the same letter as that with which they
terminate or by _w_ or _y_;

_antechamber_ _post-temporal_
_antiseptic_ _post-graduate_
_anti-imperialistic_ _prearrange_
_biennial_ _pre-empt_
_bipartisan_ _recast_
_co-equal_ _re-enter_
_co-ordinate_ _semiannual_
_demigod_ _subconscious_
_inframarginal_ _subtitle_
_international_ _superfine_
_intersperse_ _tricolor_
_intramural_ _co-workers_
_intra-atomic_ _co-yield_

Exceptions are

(_a_) Combinations with proper names or adjectives derived therefrom,
and long or unusual compounds;

_ante-bellum_ _sister-university_
_anti-license_ _post-revolutionary_
_anti-security_ _pre-Raphaelite_
_demi-relievo_ _re-tammanize_

(_b_) Words in which the omission of the hyphen would alter the sense;

_re-formation_ _reformation_
_re-cover_ _recover_
_re-creation_ _recreation_

17. The negative prefixes _un_, _in_, _il_, _im_, and _a_ do not take a
hyphen except in very rare or artificial combinations; _unmanly_,
_invisible_, _illimitable_, _impenetrable_, _asymmetrical_.

The negative prefix _non_ calls for a hyphen except in very common
words;

_non-existent_ _non-combatant_
_non-interference_ _nonsense_
_non-unionist_ _nonessential_

18. The prefixes _quasi_, _extra_, _supra_, _ultra_, and _pan_ call for
a hyphen;

_quasi-historical_ _supra-normal_
_quasi-corporation_ _ultra-conservative_
_extra-mural_ _Pan-Germanism_

_Ultramontaine_,