The Meaning of issou [一層] In Japanese

一層
いっそう
Romaji: issou N3

What does 一層 mean?

Translation and Meaning

one layer, more, even more

Definition

A degree adverb; signals an increase in intensity or extent and is used before adjectives or verbs to intensify meaning.

Type

adverb (副詞)

Stroke Order

Meanings

  • Adverb of degree expressing that something is much more or to a greater extent.
  • Intensifier placed before adjectives or verbs to amplify meaning.
  • Common in formal writing and in speech to convey a heightened sense of progression.

Etymology

Composite origin A two-kanji compound of 一 and 層, forming an adverbial sense. The pronunciation issō arises from combining the on-yomi part of 層 (sō) with a contracted form of 一 in fast speech.

Composition

  • 一: the numeral one; denotes a single unit.
  • 層: layer, tier; conveys a level in a stacked order.
  • Combination: the sense of adding a layer leads to higher degree or extent, hence the meaning of more.

Usage

Used as an adverb before adjectives or verbs to express increased degree; common in both written and spoken Japanese, especially in formal contexts. Examples of use: 一層難しくなる、一層努力する、一層美しく見える
💡 Tips
Mnemonic imagine stacking sheets: each added layer makes it thicker, just like 一層 adds intensity to a description.

Variations

  • さらに (sarani) – further, more
  • もっと (motto) – more
  • 一段と (ichidan to) – much more
  • いっそう (issou) – alternative reading with the same meaning

Example Phrases

  • 朝の電車で 友達と 会話を 交わす と 一層 楽しく なる
    asa no densha de tomodachi to kaiwa o kawasu to issō tanoshiku naru
    On the morning train, talking with a friend becomes even more enjoyable.
    Lista:
    • 朝の電車で (asa no densha de) – on the morning train
    • 友達と (tomodachi to) – with a friend
    • 会話を (kaiwa o) – conversation
    • 交わす (kawasu) – to have
    • と (to) – and
    • 一層 (issō) – even more
    • 楽しく (tanoshiku) – enjoyable
    • なる (naru) – become
    「一層」 means ‘even more’; it intensifies the following verb/adjective, here before 楽しくなる.
一層