'forcefully-built' originates from the combination of 'forcefully' and 'built', where 'forcefully' is derived from 'force', meaning 'strength or energy', and 'built' is the past participle of 'build', meaning 'to construct'.

'forcefully' evolved from the Old French word 'force', and 'built' comes from the Old English 'byldan'.

Initially, 'forcefully' meant 'with force', and 'built' meant 'constructed'. Together, they convey the idea of something constructed with great strength.