はっきりと見える
a light was plainly visible
明かりがはっきり見えた
明らかに
her mother was plainly anxious to leave
彼女の母親は明らかに帰りたがっていた
率直に
to speak plainly, I suffer from a lack of confidence
率直に言うと、自信がない
質素に
he lived plainly and worked hard
彼は質素に暮らし、一生懸命働いた
派生語