Comparative form of likely: more likely(adjective)
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Use "likelier" in a sentence
"If Republicans take the House and the Senate, how much likelier is a full extension of the Bush tax cuts?"
"Now, if Republicans take the House, how much likelier is a deficit-reduction deal that increases revenues or cuts spending by at least $700 billion over the next 10 years, thus making up for the tax cuts?"
"If Republicans take the House, how much likelier is a full extension of the Bush tax cuts?"