shalst

• shallest

• IPA^(key): /ʃælst/
• Rhymes: -ælst

shalst

1. (rare, often hypercorrect) Synonym of shalt
   • 1644, Kenelm Digby, Two Treatiſes, in the One of Which, The Natvre of Bodies; in the Other, The Natvre of Mans Sovle; is Looked Into […] ‎, Paris: Gilles Blaizot, The Concluſion, page 463:

     Thou shallest be an hour without diuiſibility: and if an houre, a yeare: if ſo, an age: and if an age, then for euer, for al eternity.

   • 1853, John Yonge Akerman, “Wat Sannell's Ride to Highworth”, in Wiltshire Tales‎, London: John Russell Smith, page 151:

     "Never mind, naybour," said Master Samuel, recovering himself, "thee shalst have a quart for it when thee com'st to my house.”

   • 2000 October 11, Sybrand Bakker, “oracle beginners”, in comp.databases.oracle.misc‎ (Usenet), message-ID <news:971288729.6856.5.pluto.d4ee154e@news.demon.nl>:

     Thou shalst also always specify thine version and thine operating system[.]

While this form does seem to have had some genuine use, it is most common as a hypercorrection.

• slasht, sthals