Iambus
/aɪˈæmbəs/
Definition 1 of 1
Pro Tip 1/3Metrical Pattern
Understanding 'iambus' is key for analyzing the rhythm and flow in English poetry. 
To grasp Shakespeare's rhythm, notice the iambus in 'Shall I compare thee to a summer's day?'
Pro Tip 2/3Poetry Emphasis
'Iambus' creates a pattern where every second syllable is emphasized, giving poems a specific beat. 
Her voice was soft, the iambus clear, with beats that danced upon the ear.
Pro Tip 3/3Not Always Perfect
Poets may not always strictly follow the iambus pattern; slight variations can create unique rhythms. 
While mostly iambic, the line 'And the sound of a voice that is still' breaks pattern.