Skip to content
Kotomora

由

wherefore, a reason

JLPTN3StatusJōyō · grade 3FrequencyTop 500Strokes5

Readings

On'yomi

  • ユ
  • ユウ
  • ユイ

Kun'yomi

  • よし
  • よ.る

Meaning

由 centers on the idea of origin or cause: the reason why something happens or the source from which it comes. The meaning 'wherefore' is an older way of asking for that reason.

Most common words using 由

20 of 206
  • 理由りゆう
    N4

    reason; grounds; pretext; excuse; motive

  • 自由じゆう
    N4

    freedom; liberty

  • 経由けいゆ
    N3

    going through; going via; going by way of

  • 由来ゆらい
    N2

    origin; source; history; derivation

  • 由よし
    N1

    reason; significance; cause

  • 不自由ふじゆう
    N3

    discomfort; inconvenience

  • 自由民主党じゆうみんしゅとう

    Liberal Democratic Party; LDP

  • 自由自在じゆうじざい

    free; unrestricted; (with) complete mastery; completely in control

  • 事由じゆう

    reason; cause; whys and wherefores; particulars

  • 由緒ゆいしょ
    N1

    history; pedigree; lineage

  • 自由党じゆうとう

    Liberal Party

  • 自由形じゆうがた

    freestyle (e.g. swimming event)

  • 由縁ゆえん

    acquaintance; relation; affinity; reason

  • 由々しいゆゆしい

    grave; serious; alarming

  • 那由他なゆた

    an extremely great number (often said to be 100 million)

  • 自由化じゆうか
    N3

    liberalization; liberalisation; freeing

  • 自由主義じゆうしゅぎ

    liberalism

  • 自由経済じゆうけいざい

    free economy

  • 自由業じゆうぎょう

    self-employed profession (e.g. actor, artist); liberal profession

  • 肢体不自由児したいふじゆうじ

    physically disabled child; child with a physical disability

Explore all words using 由 →

Study

Etymology

由 is thought to depict a sprout emerging from a field, symbolizing the origin or source of growth. This origin sense extended to mean reason or cause.

Meaning mnemonic

The vertical line poking up through the box looks like a sprout breaking through the soil. That sprout is the reason the plant exists—the origin of its growth.

Reading mnemonic

For ユ, imagine asking 'Why?' and getting the answer 'You!'—the reason is you. You -> ユ, the reason behind it all.