Broadly Weak; listless; lacking power, vigor, vitality, or colorfulness.
Near-synonyms: enervated, underoxygenated
[H]e was one of those weak creatures full of a shifty cunning - who face neither God nor man, who face not even themselves, void of pride, timorous, anæmic, hateful souls.1898, H.G. Wells, The War of the Worlds, London: William Heinemann, page 219:
1 more example
My ordinarily even disposition was shattered, I thought, beyond repair — a condition that was not improved by my utter abhorrence of a diet of infant's food and anemic vegetables.1938, Henry Goddard Leach, Forum and Century, volume 100, page 156: