abut üzerinde

listen to the pronunciation of abut üzerinde
Турецкий язык - Английский Язык
abut on
To border on

Now the two bounding notes of an enharmonic tetrachord of the relevant sort will indeed both be the lowest notes of pykna when the tetrachords are put together in conjunction; but the higher of them can never abut on a pyknon in the case envisaged here, where the tone is introduced to disjoin the tetrachords.

border on, be right next to