Worrisome
Part of speech: adjective
Definition: Causing worry; perturbing or vexing. Said of a person: inclined to worry.
Disturbing
Part of speech: adjective
Definition: Causing distress or worry; upsetting or unsettling.
Part of speech: verb
Definition: Present participle of disturb.
Example sentence: Occasionally, some brother sings very earnestly through his nose, often disturbing those around him, but it does not matter how the voice sounds to the ears of man. What is important is how the heart sounds to the ears of God.