"Withal" derives from Middle English, combining "with" and "all," and functions as both an adverb meaning "besides" or "moreover" and a preposition meaning "with." It appears frequently in Shakespeare and medieval poetry, typically positioned at the end of clauses for rhythmic emphasis or to achieve metrical requirements. The term adds formality and elegance to verse, often introducing additional information or reinforcing a preceding statement. Poets employed "withal" to maintain iambic pentameter or create sophisticated enjambment effects. Its archaic quality lends gravitas to poetic diction, making it particularly suitable for elevated or ceremonial contexts where heightened language underscores thematic importance or dramatic significance.

“Withal” means “moreover” or “in addition,” often placed at a sentence’s end in older English for emphasis. Poets and dramatists used it to sustain rhythm or add rhetorical flourish. Recognising it prevents misreading as a preposition meaning “with” and highlights the elegance of archaic syntax.