An expression meaning ‘(I begin) in the name of Allah’.
One can ‘say a bismillāh’ by reciting the phrase ‘An expression meaning ‘(I begin) In the name of God, the All-Kind, the All-Merciful’. This phrase opens all but one of the Sūrahs (chapters) of the noble Qurʾān. The exception is the ninth sūrah, at-Tawbah. ... More Raḥīm’. By saying this, one seeks Allah’s help and dedicates the next action (eating a meal, etc.) to Allah and earning His pleasure.