pre-noun adjectival
further; even more; additional
Pre-noun adjectival (rentaishi) used to emphasize a greater degree or additional step. Often found in formal or written contexts.
更なる努力が必要だ。
Further effort is needed.
更なる情報をお待ちください。
Please wait for further information.
もっと is a general adverb meaning 'more', while 更なる is a pre-noun adjectival meaning 'further' or 'additional' and is more formal.
さらに is an adverb meaning 'furthermore' or 'even more', while 更なる is its pre-noun adjectival form used before nouns.
Derived from the adverb さらに (furthermore) with the addition of the archaic attributive form なる of the copula なり, creating a pre-noun adjectival.