The word 'steadily-grown' is a compound formed from 'steadily' (from 'steady') and 'grown' (past participle of 'grow'). 'Steadily' comes from 'steady,' which originates from Middle English 'stedi,' meaning 'firm, fixed.' 'Grown' is the past participle of 'grow,' which comes from Old English 'grōwan,' meaning 'to grow.'

'Steadily' evolved from 'steady' in Middle English, and 'grown' from Old English 'grōwan.' The compound 'steadily-grown' is a modern English formation, combining the adverb and past participle to describe something that has grown in a steady manner.

Initially, the components meant 'in a steady way' and 'grown,' and together they now mean 'having grown in a steady, consistent manner.'