I-adjective (keiyoushi)

light (i.e. not heavy); feeling light (i.e. offering little resistance, moving easily)

light (i.e. of foot); effortless; nimble; agile

non-serious; minor; unimportant; trivial

slight; small; gentle; soft; easy; lighthearted (e.g. joke)

easy; simple

indiscriminate

see 口が軽い

light (shape or stones); stones that are not solid but can be used to sacrifice to gain something elsewhere

Go (game)see 重い