1.VerbTo give life or spirit to; to revive or animate.
2.VerbTo make more lively, cheerful or interesting.
"The game was much enlivened when both teams scored within five minutes of each other."
3.Verb↑ The Oxford English Dictionary (2007) states that enliven was formed by the simultaneous prefixing of en- and suffixing of -en, which, by definition, constitutes circumfixation.