Definify.com
Webster 1913 Edition
Unable
Un-a′ble
,Adj.
Not able; not having sufficient strength, means, knowledge, skill, or the like; impotent; weak; helpless; incapable; – now usually followed by an infinitive or an adverbial phrase;
as,
. unable
for work; unable
to bear fatigueSapless age and weak
unable
limbs. Shakespeare
Webster 1828 Edition
Unable
UNA'BLE
, a.1.
Not able; not having sufficient strength or means; impotent; weak in power, or poor in substance. A man is unable to rise when sick; he is unable to labor; he is unable to support his family or to purchase a farm; he is unable for a particular enterprise.2.
Not having adequate knowledge or skill. A man is unable to paint a good likeness; he is unable to command a ship or an army.