The word "lengthen" is a verb. It means to make something longer or increase in length.
Outlast means to last longer.
The word "lengthen" is a verb. It means to make something longer or to increase the length of something.
Legalise
pollute
The verb hacer means "to do" or "to make."
The verb "Illuminate" has four syllables and means to make lighter by shining light on something.
The verb of destruction is "destroy" - it means to damage something so severely that it can no longer be used or repaired.
The word "once" is indeed an adverb. It means occurring on an occasion, or having occurred previously but not now. *One construction to make the distinction is to place once after the verb if it means one occasion to date. Place once before the verb to indicate that it is no longer being done. Example: "We went there once" (one time) "We once went there" (previously but no longer)
imagine
Clarify is a verb that means "to make (an idea, statement, etc.) clear or intelligable; to free from ambiguity".
The word Xerox is used as a verb. It means to make a copy.