〜てしかたがない te shikata ga nai
〜てしかたがない（te shikata ga nai）means “can't help feeling ~; ~ unbearably”. Expresses that a feeling or sensation is so strong it can't be controlled or borne. Formation: V-て + しかたがない／Aい-くて + しかたがない／ナA-で + しかたがない（口語：〜てしょうがない／〜てたまらない）
can't help feeling ~; ~ unbearably
N3Formation
V-て + しかたがない／Aい-くて + しかたがない／ナA-で + しかたがない（口語：〜てしょうがない／〜てたまらない）
Explanation
Expresses that a feeling or sensation is so strong it can't be controlled or borne. Used mainly with emotions and bodily sensations (sleepy, lonely, worried, itchy). 'I can't help feeling ~ / ~ to an unbearable degree.'
Examples
Note
Casual variant: 〜てしょうがない. Stronger near-synonym: 〜てたまらない. Subject is usually first-person feelings.
FAQ
〜てしかたがない — what does it mean and how is it used?
can't help feeling ~; ~ unbearably. Expresses that a feeling or sensation is so strong it can't be controlled or borne. Used mainly with emotions and bodily sensations (sleepy, lonely, worried, itchy). 'I can't help feeling ~ / ~ to an unbearable degree.'
〜てしかたがない — how do you form it?
V-て + しかたがない／Aい-くて + しかたがない／ナA-で + しかたがない（口語：〜てしょうがない／〜てたまらない）
〜てしかたがない — any usage notes?
Casual variant: 〜てしょうがない. Stronger near-synonym: 〜てたまらない. Subject is usually first-person feelings.