shrill

(verb) utter a shrill cry. Synonyms: shriek, pipe up, pipe.

(adj) having or emitting a high-pitched and sharp tone or tones . Synonyms: sharp. Examples: "A shrill whistle." "A shrill gaiety."

(adj) being sharply insistent on being heard. Synonyms: strident. Examples: "Strident demands." "Shrill criticism."

(adj) of colors that are bright and gaudy. Example: "A shrill turquoise."