pro·long 
(prə-lông, -lŏng)
(prə-lông, -lŏng)tr.v. pro·longed, pro·long·ing, pro·longs
To lengthen in duration; protract: factors that prolong the drug's effect.
[Middle English prolongen, from Old French prolonguer, from Late Latin prōlongāre : Latin prō-, forth; see PRO-1 + Latin longus, long; see del-1 in the Appendix of Indo-European roots.]
pro·longer n.
- walk off/away with
- walk off with
- walk of life
- walk of shame
- walk-on
- walk on air
- walk out
- walkout
- walk out on
- walk over
- walkover
- walk (someone) through
- walk someone through
- walk the plank
- walk the walk
- walk through
- walk-through
- walk through
- walkup
- walk-up
- walkway
- Walkyrie
- Walkyrie
- walky-talky
- walky-talky