IPA: //pɛnˈtæmətər//
KK: /pɛnˈtæmətər/
A line in poetry that has five sets of stressed and unstressed syllables.
Shakespeare often wrote in iambic pentameter, giving his plays a rhythmic quality.
Pentameter → It is formed from "penta-" (from Greek "pente", meaning five) and "metron" (meaning measure). The word describes a line of verse that has five metrical feet, hence the name pentameter.
Think of 'five' ('penta-') as the number of measures in a line of poetry, which helps you remember that pentameter refers to a poetic line with five feet.