The Compose key (known also as Multi_key) causes the computer to interpret the next few keystrokes as a combination in order to produce a character not found on the keyboard.
Taqeffalt tuddist (yettwassnen Multi_key) tettarra aselkim igezzu tiyita n tsura i d-itrddun d tisuddas i wakken ad d-isuffeɣ asekkil i ulac ɣef unasiw.