unutterables

I daren't assume my disguise inside the palace, so I stuffed it into a handbag, all but the boots, which I put on under my unutterables.

Flashman and the Mountain of Light Fraser, George MacDonald, 1925- 1990

I daren't assume my disguise inside the palace, so I stuffed it into a handbag, all but the boots, which I put on under my unutterables.

Flashman And The Mountain Of Light Fraser, George MacDonald, 1925- 1990

The girls pouted, and mamas looked unutterables when their curiosity found no relief; while the men were wisely silent, though equally diligent in fruitless investigation.

Idle Hour Stories Eugenia Dunlap Potts

Most will agree that euphemism is an acceptable means of avoiding the unmentionables, unutterables, inexplicables, ineffables, inexpressibles, and whatever else they have been called.

VERBATIM: The Language Quarterly Vol XVIII No 2 1991

Farmer and Henley in their Dictionary of Slang and Colloquial English (London: 1912) list such words as ineffables, inexpressibles, unthinkables, unutterables, unwhisperables, etc.

VERBATIM: The Language Quarterly Vol XII No 1 1985

"Father looks unutterables, Mother's plainly worried to death, Egbert is sulks personified, Queenie won't tell, Athelstane and Hereward either don't know or don't care what's the matter, but it makes them cross.

A Popular Schoolgirl Angela Brazil 1907

They will hint unutterables and look unutterables, but when it comes to _saying_ -- no, thank you, they are not taking any. "

The Sign of the Spider Bertram Mitford 1884