agerasia
n. youthful appearance in an old person

Also:

neanimorphism
n. the quality of looking younger than one’s age

Mamihlapinatapais, from the Yaghan language of Tierra del Fuego, is considered the world’s most succinct word — and the hardest to translate.

It means “a look shared by two people, each wishing that the other will initiate something that both desire but that neither one wants to start.”

Sir Fletcher Norton was noted for his want of courtesy. When pleading before Lord Mansfield on some question of manorial right, he chanced unfortunately to say, ‘My lord, I can illustrate the point in an instance in my own person; I myself have two little manors.’ The judge immediately interposed with one of his blandest smiles, ‘We all know it, Sir Fletcher.’

— John Timbs, A Century of Anecdote, 1873

psaphonic
n. planning one’s rise to wealth and fame

exsibilation
n. the action of hissing off the stage

A certain gentleman of Worcester (Mass.) sent a very fine French clock to a well-known jeweler to be repaired, saying that he wished each item of repairing specified. The following is a copy of the bill as rendered:

To removing the alluvial deposit and oleaginous conglomerate from clock a la French, … $0.50
To replacing in appropriate juxtaposition the constituent components of said clock, … .50
To lubricating with oleaginous solution the apex of pinions of said clock, … .50
To adjusting horologically the isochronal mechanism of said clock, … .50
To equalizing the acoustic resultant of escape wheel percussion upon the verge pallets of said clock, … .50
To adjusting the distance between the centre of gravity of the pendulum and its point of suspension, so that the vibrations of the pendulum shall cause the index hand to indicate approximately the daily arrival of the sun at its meridian height, … .50
Total: $3.00

— Frank H. Stauffer, The Queer, the Quaint and the Quizzical, 1882

I take it you already know
Of tough and bough and cough and dough.
Others may stumble, but not you,
On hiccough, thorough, laugh, and through.
Well done! And now you wish, perhaps,
To learn of less familiar traps.
Beware of heard, a dreadful word,
That looks like beard and sounds like bird.
And dead—it’s said like bed, not bead,
For goodness’ sake, don’t call it deed!
Watch out for meat and great and threat,
(They rhyme with suite and straight and debt).
A moth is not a moth in mother,
Nor both in bother, broth in brother.
And here is not a match for there,
Nor dear and fear for bear and pear.
And then there’s dose and rose and lose—
Just look them up—and goose and choose.
And cork and work and card and ward,
And font and front and word and sword.
And do and go and thwart and cart—
Come, come, I’ve hardly made a start!
A dreadful language? Why, man alive!
I’d mastered it when I was five!

— Anonymous

opsimath
n. one who studies late in life

Count Valavoir, a general in the French service under Turenne, while encamped before the enemy, attempted one night to pass a sentinel. The sentinel challenged him, and the count answered ‘Va-la-voir,’ which literally signifies ‘Go and see.’ The soldier, who took the words in this sense, indignantly repeated the challenge, and was answered in the same manner, when he fired; and the unfortunate Count fell dead upon the spot,–a victim to the whimsicality of his surname.

— Charles Carroll Bombaugh, Gleanings for the Curious From the Harvest-Fields of Literature, 1890