prolong
verb (used with object)
to lengthen out in time; extend the duration of; cause to continue longer.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The look the two men exchanged appeared to her a prolongment of their earnest interrogation in the picture gallery; but this time it struck her that both carried it off less well.
From The Coast of Chance by Clarence F. Underwood