Definition

Adverb: Used to introduce an additional point that strengthens or supports a previous statement. It indicates that the following information is more significant or surprising than what was just mentioned.

Usage

The phrase "what is more" functions as a sentence adverb or a conjunctive adverb. It is used to add a stronger, often more compelling, piece of information to an argument or description. It typically appears at the beginning of a clause, followed by a comma.

Examples

• The plan is risky and expensive. What is more, it has never been tested before.
• She is an excellent programmer. What is more, she has great leadership skills.
• The apartment is small for the price. What is more, it faces a noisy street.

Advanced Usage

• Positioning for Emphasis: While usually placed at the start of a clause, it can sometimes be inserted mid-sentence for stylistic variation, set off by commas.
  • The evidence was circumstantial and, what is more, provided by an unreliable witness.
• Formal and Persuasive Contexts: This phrase is common in formal writing, debates, and persuasive essays to build a cumulative argument.

Variants and Related Words

• Furthermore (adv.): In addition to what has been said. (Slightly more formal)
• Moreover (adv.): Beyond what has been said; besides. (Formal)
• Additionally (adv.): As an extra fact or point.
• On top of that (idiom): In addition to everything else. (More informal)

Synonyms

moreover, furthermore, additionally, besides, also, to boot, into the bargain

Related Phrases and Idioms

• To make matters worse: Used to introduce a point that complicates or worsens a situation. (Has a more negative connotation than "what is more").
  • We were already late, and to make matters worse, the car wouldn't start.
• As if that weren't enough: Similar to "to make matters worse," used before stating an additional, often overwhelming, fact.
  • The project was over budget. As if that weren't enough, the lead designer resigned.

Adverb

1. in addition; furthermore, their quality is improving"; moreover, mice nested there"
   • computer chess games are getting cheaper all the time
   • the cellar was dark
   • what is more, there's no sign of a change