ⲟⲩ ⲕⲓⲙ ⲡⲉ ⲙⲛ̅ ⲟⲩ ⲁⲛⲁⲡⲁⲩ̈ⲥⲓ̈ⲥ
The trick with Thomas is that he is deliberately ambivalent, with often providing a superficial translation that has an alternative one as well
"A movement is with a repose" is regular Coptic to convey what we would state as "a movement is, and a repose", or, in more regular English, "it is a movement with a repose".
However, and I most definitely would appreciate your expert opinions here, I think this can also say
"A movement is, there-is-not a repose"
ⲙⲛ- S Partikel Ausdruck der Nichtexistenz would be my application, and I don't know of a Bohairic version of that:
https://remnqymi.com/crum/?query=%E2%B2%99%E2%B2%9B-#gsc.tab=0