'normally-joined' originates from the combination of 'normal' and 'join', where 'normal' meant 'usual or typical' and 'join' meant 'to connect or link'.

'normally-joined' evolved from the Middle English word 'joinen', which meant 'to unite or connect', and 'normal', which has retained its meaning over time.

Initially, 'join' meant 'to unite or connect', and 'normal' meant 'usual or typical'. The combination 'normally-joined' has retained these meanings in modern usage.