Not easily
penetrated, cut, or separated into parts; not yielding to pressure;
firm; solid; compact; -- applied to material bodies, and opposed to
soft; as, hard wood; hard flesh; a hard
apple.
Difficult, mentally or judicially; not
easily apprehended, decided, or resolved; as a hard
problem.
Difficult to accomplish; full of
obstacles; laborious; fatiguing; arduous; as, a hard task; a
disease hard to cure.
Difficult to resist or control;
powerful.
Difficult to bear or endure; not easy to
put up with or consent to; hence, severe; rigorous; oppressive;
distressing; unjust; grasping; as, a hard lot; hard
times; hard fare; a hard winter; hard conditions
or terms.
Difficult to please or influence; stern;
unyielding; obdurate; unsympathetic; unfeeling; cruel; as, a
hard master; a hard heart; hard words; a
hard character.
Not easy or agreeable to the taste; harsh;
stiff; rigid; ungraceful; repelling; as, a hard
style.
Rough; acid; sour, as liquors; as,
hard cider.
Abrupt or explosive in
utterance; not aspirated, sibilated, or pronounced with a gradual
change of the organs from one position to another; -- said of certain
consonants, as c in came, and g in go, as
distinguished from the same letters in center, general,
etc.
Wanting softness or smoothness of
utterance; harsh; as, a hard tone.
Rigid in the drawing or distribution of the figures; formal;
lacking grace of composition.
In celebration of Noah Webster's Birthday (October 16, 2009), we have prepared an updated website. 
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