transpositional en · ADJ
Etymology
From transposition + -al.
Meanings
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(not-comparable) Pertaining to, or involving, transposition.
[…]the most striking and most offensive error in pronunciation among the Londoners, I confess, lies in the transpositional use of the letters W, and V[…].
1803, Samuel Pegge, Anecdotes of the English Language; chiefly regarding the Local Dialect of London and its Environs: