adverbial N2 common politewritten
一層 — even more / all the more ~
一層 ・ いっそう
Meaning
- even more / still more / all the more — raises the degree one notch above the current level, often deliberately or as a result
Formal-leaning 'a step further up'; frequently follows a cause ('because of that, all the more ~') or marks doing something to a higher degree.
Key sentence
彼の言葉で、私は一層やる気が出た。
His words made me even more motivated.
Usage
Formal-leaning; common in set polite phrases (一層のご支援 'your further support'). より一層 is a common intensified pairing.
Examples
今後とも一層の努力を続けてまいります。
We will continue to make even greater efforts from here on.
雪が積もって、景色は一層美しくなった。
With the snow piled up, the scenery became all the more beautiful.
Easily confused with
See 一層 in real sentences
Jengo shows 一層 the way you actually meet it: inside real Japanese sentences, so it sticks instead of staying an abstract rule.
Study it in JengoSources Compiled with reference to A Dictionary of Advanced Japanese Grammar.