prolong
Concise Oxford English Dictionary © 2008 Oxford University Press:
prolong/prəˈlɒŋ/
▶verb
- 1 extend the duration of.
- 2 technical extend in spatial length.
– derivatives
prolongation noun,
prolonger noun.
prolongation noun,
prolonger noun.
– origin ME: from OFr. prolonguer, from late L. prolongare, from pro- ‘forward, onward’ + longus ‘long’.
'prolong' also found in these Oxford entries:

