utrwalenie in English:

My sister has an absolute fixation with healthy food.

fixation /fɪkˈseɪʃn; US / noun [countable] a fixation (with sth) an interest in sth that is too strong and not normal I’m tired of James’s fixation with football. ▶ mania obsesja bzik

The talks have resulted in consolidation of our alliance.

real effort needs to be made towards consolidation of the European Union