Poetic taḍmīn also has associated labels based on the amount and use of borrowed verse. Istiʿānah concerns a full verse or more, while īdāʿ and rafw are discussed for a hemistich or a smaller portion.
The word rafw suggests mending or joining, as borrowed wording is woven into a new poem. These labels identify patterns of incorporation; they should not be treated as completely interchangeable terms without attention to their particular usage.