Cases of word usage

1) green water plants with a very simple structure (algae)

2) (of) a person who (often for religious reasons) leads a very simple life without pleasures (ascetic)

3) a short, simple song (ditty)

4) simple and plain; like a home (homely)

5) a short description, usually a poem, of simple country life, especially described as extremely pleasant (idyll)

6) simple and extremely pleasant (idyllic)

7) a metallic ringing sound (as of coils, keys or small bells); a short and simple phrase or poem, especially with a simple tune, that is easily remembered (jingle)

8) a simple song or tune; a tuneful section or theme in music (melody)

9) richly decorated; (od literature) not simple in style or vocabulary (ornate)

10) a simple story used to teach a moral lesson (parable)