وَإِذَا كَالُوهُمْ أَو وَّزَنُوهُمْ يُخْسِرُونَ
Sentence structure
وَإِذَا coordinates another non-jussive condition. كَالُوهُمْ and وَّزَنُوهُمْ are alternative coordinated condition verbs, while يُخْسِرُونَ is the response.
Ayah summary
But when measuring or weighing for others, they give less, making their conduct even more blameworthy.
وَإِذَا — But when
Grammar: وَ coordinates the clause; إِذَا is a future non-jussive conditional time adverb.
كَالُوهُمْ — they give by measure (to) them
Grammar: A masculine-plural perfect condition verb. Attached و is the subject and هُمْ the object.
أَو — or
Grammar: a conjunction.
وَّزَنُوهُمْ — they weigh (for) them
Grammar: A coordinated masculine-plural perfect. Attached و is the subject and هُمْ the object.
يُخْسِرُونَ — they give less
Grammar: A Form IV masculine-plural imperfect serving as the non-jussive conditional response. Attached و is the subject and final ن marks the indicative.