Fly-by-night and Weak

Fly-by-night adjective - (of businesses and businessmen) unscrupulous.

Weak and fly-by-night are semantically related. In some cases you can use "Weak" instead an adjective phrase "Fly-by-night".

Weak adjective - Lacking bodily strength.

Fly-by-night and weak are semantically related. Sometimes you can use "Fly-by-night" instead an adjective "Weak".

Nearby Words: weaken, weakness, weakly, weakening, weakling