frowningгерундий или причастие настоящего времени Explicitly marks the participial adjective use of "frowning".
Определения
Showing or marked by the action of pulling the eyebrows together in displeasure, worry, or concentration. The frowning guards stood silently at the palace gates.
frownгерундий или причастие настоящего времени Used to modify nouns, describing someone or something that is currently frowning.
Определения
Displaying a frown; scowling. The frowning statue looked ominous in the twilight.