true aspirates: and for the same reasons.
They are rare combinations that require effort and attention.

s. 364. The second class of exceptions contains those words wherein between
the first element and the second there is so great a disparity, either in
the length of the vowel, or the length of the syllable _en masse_, as to
counteract the natural tendency of the first element to become accented.
One of the few specimens of this class (which after all may consist of
double words) is the term _upst['a]nding_. Here it should be remembered,
that words like _haph['a]zard_, _foolh['a]rdy_, _uph['o]lder_, and
_withh['o]ld_ come under the first class of the exceptions.

s. 365. The third class of exceptions contains words like _perch['a]nce_
and _perh['a]ps_. In all respects but one these are double words, just as
_by chance_ is a double word. _Per_, however, differs from _by_ in having
no separate existence. This sort of words we owe to the multiplicity of
elements (classical and Gothic) in the English language.

s. 366. _Peacock_, _peahen_.--If these words be rendered masculine or
feminine by the addition of the elements -cock and -hen, the statements
made in the beginning of the present chapter are invalidated. Since, if the
word _pea-_ be particularized, qualified, or defined by the words -cock and
-hen, the _second_ term defines or particularises the _first_, which is
contrary to the rule of s. 356. The truth, however, is, that the words
-cock and -hen are defined by the prefix _pea-_. Preparatory to the
exhibition of this, let us remember that the word _pea_ (although now found
in composition only) is a true and independent substantive, the name of a
species of fowl, like _pheasant_, _partridge_, or any other appellation. It
is the Latin _pavo_, German _pfau_. Now if the word _peacock_ mean a _pea_
(_pfau_ or _pavo_) that is a male, then do _wood-cock_, _black-cock_, and
_bantam-cock_, mean _woods_, _blacks_, and _bantams_ that are male. Or if
the word _peahen_ mean a _pea_ (_pfau_ or _pavo_) that is female, then do
_moorhen_ and _guineahen_ mean _moors_ and _guineas_ that are female.
Again, if a _peahen_ mean a _pea_ (_pfau_ or _pavo_) that is female, then
does the compound _pheasant-hen_ mean the same as _hen-pheasant_; which is
not the case. The fact is that _peacock_ means a _cock that is a pea_
(_pfau_ or _pavo_); _peahen_ means a _hen that is a pea_ (_pfau_ or
_pavo_); and, finally, _peafowl_ means a _fowl that is