Let's learn about "어쩔 수 없지 뭐"

어쩔 수 없지 (뭐) : It is what is it; There is nothing I can do

[other expressions]

- 어쩔 수 없다. (to younger people or friends)

- 어쩔 수 없네. (to younger people or friends)

- 어쩔 수 없어. (to younger people or friends)

- 어쩔 수 없군!. (to younger people or friends)

- 어쩔 수 없구나!. (to younger people or friends)

- 어쩔 수 없네요. (honourific by '-요')

- 어쩔 수 없군요! (honourific by '-요')

- 어쩔 수 없어요. (honourific by '-요')

- 어쩔 수 없습니다. (formal; more honourific by '-스')

[explanations]

* 어쩌다 = 어쩌다가 : (1) [=우연히•뜻밖에] accidentally, by chance, by accident, somehow (2) [가끔•이따금] at times sometimes, occasionally, (every) once in a while, from time to time, (every) now and then 

* 어쩌다 : a short form of 어찌하다 / 어떻게 하다; do something

- 미안해서 어쩌나 = 미안해서 어떻게 하나 : Oh, my. I'm sorry

- 어쩔 줄을 모르고 우왕좌왕하다 : be at a loss what to do not know what to do

- 어쩔 수 없다 = 불가피하다 : (1) be unavoidable; be inevitable (2) [=긴급하다] be urgent; be pressing (3) [=다룰 수 없다〕 be incontestable; be indisputable; be undeniable

- 어찌할 수 없는 사정으로 : under[owing to/on account of] unavoidable circumstances/driven by circumstances.

- 나는 어찌할 수 없이 사직했다 : I was forced to resign my post.

- 그것은 어찌할 수 없다 : It can't be helped./It is unavoidable

- 어찌할 수 없는 사실 : an undeniable[indisputable] fact/a fact beyond dispute.

- 나이는 어찌할 수 없다 : Age will tell./There is no contending against age./Age brings its unmistakable signs with it.

- 아이들은 어찌할 수 없다 : Children are children

- 어찌할 바를 모르다 : be at a loss; be at one's wit's[wits'] end; be bewildered; be puzzled[perplexed] what to do; do not know what to do

- 나는 그에게 거절을 당해 어찌할 바를 몰랐다 : I was at a loss[at my wit's end] when he turned me down

* 어쩐 : an attributive form of 어쩌다; do something for a reason; what business; any business

-  어쩐 일로 오셨어요? = 무슨 일로 오셨어요? : What brings you here?

* 어쩔 : 어쩌(the stem of 어쩌다) + -ㄹ(a suffix makes a verb future tense and attributive)

* 수 : [=수단•방법] a method; a way

* 없다 : be not; not exist; there is not; there are not

* 뭐 : this means "well" in English

* 없습니다 : 없(the stem of 없다) + -스(a suffix makes a verb more honourific) + -ㅂ니다(an honourific descriptive verb ending suffix by '-ㅂ')

* a verb + -다 / -네 / -어 : a non-honourific descriptive verb ending suffix

* a verb + -군! / -구나! : a non-honourific exclamatory verb ending suffix

* a verb + -네 / -어 / -군! + -요 : an honourific verb ending suffix

* a verb + -습니다 / -ㅂ니다: an honourific descriptive verb ending suffix by '스' / '-ㅂ'