Is there a tacit definition of such a verb? Is there a way to pass a
value to the adverb?

f =: 3 : '0 (<:y)} 11 22 33'

   f 1
0 22 33
   f 2
11 0 33


PS. Also, I couldn't suspect that besides a usual definition of dyad
adverb such as

1 : ('';':';'...x...m...y...')  NB. explicit defs inside

there's also a shorter way:

1 : '...[...x...]...'  NB. tacit defs inside

Of course the reading of The Phrases is very useful... but so hard!
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