Tarṣīʿ does not require the exact same word to recur. Its core is a patterned correspondence between expressions occupying parallel positions in two units. Different words can create ornament through related patterns and endings.
Simple repetition is not automatically tarṣīʿ. Jinas may concern the relation between two expressions, whereas tarṣīʿ typically arranges correspondence over multiple word pairs.
To analyze an example, align the clauses word by word, then test both pattern and final rhyme for each comparable pair.