-fəl adjective
Etymology: Middle English boostful, bostful, from boost, bost boast + -ful
: given to or marked by boasting
silly young officers, who talked in bellicose and boastful terms — Times Literary Supplement
• boast·ful·ly -fəlē, -li adverb
• boast·ful·ness -lnə̇s noun -es