to adjust the tones of a musical instrument to the required scale/pitch

Accorder - French

Afinar - Spanish (Castilian)

Ccuddari - Italian (Sicilian)

Slagati - Croatian

Složiti - Croatian

Stimmen - German

Štimuva - Macedonian

Temblar - Bable (Asturian)

Tune (to ~) - English

Ugađati - Croatian

Ugadjati - ? (Serbo-Croatian)

Uglašati - Slovenian

Uglašavati - Serbian