and its meaning is that one should end every two rakʿahs with the salām.
– “When any of you fears that dawn is about to break”: that is, when he suspects the night will expire with the rising of dawn.
– “It will make his prayer odd (tūtir lahu)”: expressed in the passive; the intention is that the single rakʿah turns the prayer into witr. Witr—pronounced with a short i after the w—is the odd number, the opposite of shafʿ (even).