Word Games Pro Dictionaryeffortfulness nounthe quality of requiring deliberate effort ⧉Copy definition ↗Share ▣Print / Save PDFQuick referenceWord FactsWord length13Starts withEEnds withSContainsFFScrabble score22Database sourceOEWN 2025 CoreMeaningDefinitionsnounthe quality of requiring deliberate effortOpposite wordsAntonyms effortlessnessKeep exploringRelated Tools Word Unscrambler Build words from mixed letters. → Scrabble Finder Find playable words and scores. → Word Finder Search A–Z word lists and patterns. → Words Containing FF Words containing FF. → Ends With S Words ending with S. → 13 Letter Words Explore verified 13-letter words. →