但 means “however, provided that”

ただし · tadashi

Also: but

Kun'yomi (Japanese reading)
ただし
On'yomi (Chinese reading)
タン

JLPT N1 · Taught in secondary school · 7 strokes

The story

A person (亻) beside 旦, the sun just over the horizon: picture someone raising a finger at dawn to add one condition. 但し is "however" or "provided that", and a Japanese receipt has a 但し line saying what the money was for.

Used in 但し (tadashi, however/provided that) and 但し書き (tadashigaki, proviso)

More from Formal Words

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Readings from KANJIDIC2, © EDRDG, CC BY-SA.