'undomesticatedly' originates from English, specifically formed by the negative prefix 'un-' + the adjective 'domesticated' (from the verb 'domesticate'), where 'un-' meant 'not' and 'domesticate' ultimately comes from Latin elements related to 'domus' meaning 'house'.

'domesticate' derives from Latin 'domesticus' (from 'domus' meaning 'house'), passed into Old French/Medieval Latin forms and Middle English as 'domestic', later giving the verb 'domesticate'. The adjective 'domesticated' developed from that verb, 'undomesticated' is the negative form, and the adverb 'undomesticatedly' is formed by adding '-ly'.

Initially related to 'of the house' or 'belonging to the household' (Latin 'domesticus'), the root evolved into the sense 'to make suitable for home or tame'. Over time, the negative form came to mean 'not tamed' and the adverb now means 'in a wild or untamed manner'.