innocent, lawful, meritorious, right, just, legal, moral, virtuous.
_Daily_ is the Saxon and popular, _diurnal_ the Latin and scientific term. In strict usage, _daily_ is the antonym of _nightly_ as _diurnal_ is of _nocturnal_. _Daily_ is not, however, held strictly to this use; a physician makes _daily_ visits if he calls at some time within each period of twenty-four hours. _Diurnal_ is more exact in all its uses; a _diurnal_ flower opens or blooms only in daylight; a _diurnal_ bird or animal flies or ranges only by day: in contradistinction to _nocturnal_ flowers, birds, etc. A _diurnal_ motion exactly fills an astronomical day or the time of one rotation of a planet on its axis, while a _daily_ motion is much less definite.
hazard, insecurity, jeopardy, peril, risk.
_Danger_ is exposure to possible evil, which may be either near and probable or remote and doubtful; _peril_ is exposure to imminent and sharply threatening evil, especially to such as results from violence. An invalid may be in _danger_ of consumption; a disarmed soldier is in _peril_ of death. _Jeopardy_ is nearly the same as _peril_, but involves, like _risk_, more of the element of chance or uncertainty; a man tried upon a capital charge is said to be put in _jeopardy_ of life. _Insecurity_ is a feeble word, but exceedingly broad, applying to the placing of a dish, or the possibilities of a life, a fortune, or a government. Compare HAZARD.
defense, immunity, protection, safeguard, safety, security, shelter.
black, dusky, mysterious, sable, somber, dim, gloomy, obscure, shadowy, swart, dismal, murky, opaque, shady, swarthy.
Strictly, that which is _black_ is absolutely destitute of color; that which is _dark_ is absolutely destitute of light. In common speech, however, a coat is _black_, tho not optically colorless; the night is _dark_, tho the stars shine. That is _obscure_, _shadowy_, or _shady_ from which the light is more or less cut off. _Dusky_ is applied to objects which appear as if viewed in fading light; the word is often used, as are _swart_ and _swarthy_, of the human skin when quite _dark_, or even verging toward _black_. _Dim_ refers to imperfection of outline, from distance, darkness, mist, etc., or from some defect of vision. _Opaque_ objects, as smoked glass, are impervious to light. _Murky_ is said of that which is at once _dark_, _obscure_, and _gloomy_; as, a _murky_ den; a _murky_ sky. Figuratively, _dark_ is emblematic of sadness, agreeing with _somber_, _dismal_, _gloomy_, also of moral evil; as, a _dark_ deed. Of intellectual matters, _dark_ is now rarely used in the old sense of a _dark_ saying, etc. See MYSTERIOUS; OBSCURE.