This is the 6541st most frequent Japanese word.
チクチク
"チクチク" describes a prickly, stinging, or irritating sensation.
In this sentence, 'チクチク' describes the texture of the sweater as being irritating or prickly against the skin.
このセーターはチクチクして着るのが難しい。
This sweater feels prickly and is difficult to wear.
Here, 'チクチク' is used metaphorically to convey the feeling of emotional pain caused by someone's words.
彼の言葉はチクチクと心に刺さる。
His words sting and prick my heart.
In this context, 'チクチク' refers to the physical sensation of discomfort caused by the cat's fur brushing against the skin.