English
extrabold
From extra- + bold.
Proto-Indo-European *h₁éǵʰs ‘out’
Proto-Indo-European *h₁eǵʰsteros
Proto-Italic *eksteros
Latin exter ‘being on the outside’
Latin extrā ‘outside, except, beyond’
English extra-
Proto-Indo-European *bʰel- ‘to sound’
Proto-Germanic *balþaz ‘strong, bold’
Proto-West Germanic *balþ ‘bold, brave’
Old English bald ‘bold, brave, confident, strong, of good…’
Middle English bold
English bold
Today it means
adj Very bold.
Language periods are conventional ranges, not dates for this word.
Etymograph / extrabold