JMdict entry #1475500

1. Ichidan verbtransitive verb to dilute; to water down; to thin; to lighten (e.g. a color); to make less strong (e.g. flavor, depth, etc.)
2. Ichidan verbtransitive verb to soften (e.g. a statement, impression, etc.); to weaken (e.g. an effect); to tone down; to temper