undo
undo
UK[ʌnˈduː]US[ʌnˈduː]
v
To open or release something that was tied, fastened, or closed.
v
To remove the effects of a previous action; to cancel or reverse.
Morpheme Breakdown
un
do
un
reverse
do
perform
Etymology
The word 'undo' is a straightforward compound formed from two native English elements. The prefix 'un-', deriving from the Old English 'un-', 'on-', is a common Germanic negation and reversal marker. The verb 'do' originates from the Old English 'dōn', from the Proto-Germanic 'dōną', meaning "to put, place, or do." The combination literally means "to reverse a doing." This logical construction, where 'un-' systematically negates or reverses the action of the verb it precedes, has been a productive pattern in English since its earliest stages, creating verbs like 'unbind', 'unlock', and 'untie'. The semantic journey from the literal act of unfastening to the abstract concept of reversing a process or action is a natural extension of this core logic.
Analysis
Structure: un (reverse) + do (perform)
- un: A prefix of Old English origin, meaning "not" or "the opposite of," used here to indicate reversal.
- do: A verb of Old English origin, meaning "to perform, act, or execute."
Examples
She reached behind her back to undo the knot of her apron.
The new manager's first task was to undo the unpopular policies of his predecessor.
I wish I could undo the damage caused by my careless words.