Final answer:
The term for writing in unrhymed iambic pentameter is blank verse.
Step-by-step explanation:
The term for writing in unrhymed iambic pentameter is blank verse.
Blank verse is a form of poetry written in iambic pentameter lines that do not rhyme. It is a poetic meter in which each line contains five sets of iambs, or about ten syllables.
Shakespeare wrote Romeo and Juliet in blank verse, which allowed him to use the rhythmic and poetic structure to convey emotions and emphasize certain words or ideas.