Let's learn about "전혀 관심 없어"

전혀 관심 없어 / 전혀 신경 안 써 : I couldn't care less

[other expressions]

- 전혀 관심 없다. (to younger people or friends)

- 전혀 관심 없네. (to younger people or friends)

- 전혀 관심 없어. (to younger people or friends)

- 전혀 관심 없는데. (to younger people or friends)

- 전혀 관심 없는데요. (honourific by '요')

- 전혀 관심 없네요. (honourific by '요')

- 전혀 관심 없어요. (honourific by '요')

- 전혀 관심 없습니다. (formal; more honourific by '스')

- 전혀 신경 안 쓴다. (to younger people or friends)

- 전혀 신경 안 쓰네. (to younger people or friends)

- 전혀 신경 안 써. (to younger people or friends)

- 전혀 신경 안 쓰는데. (to younger people or friends)

- 전혀 신경 안 쓰는데요. (honourific by '요')

- 전혀 신경 안 쓰네요. (honourific by '요')

- 전혀 신경 안 써요. (honourific by '요')

- 전혀 신경 안 씁니다. (formal; honourific by 'ㅂ')

[explanations]

* 나 : I (non-honourific word); 난 can be used

* 저 : I (non-honourific word); 전 can be used

* -는 : a suffix makes 나 / 저 subjective after a word ends in a vowel

* 난 : a short form of 나는; this omitted

* 전 : a short from of 저는; this omitted

* 전혀 : not at all; never

* 관심 : concern; interest

* -이 : a particle makes 관심 the topic of the sentence after a word ends in a consonant

* 없다 : be not; don't exist

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

* 신경 : (1) nerves (2) concern; interest

* -을 : a particle makes 신경 objective after a word ends in a consonant

* 안 : this is equal to "not" in English

* 쓰다 : (1) write down (2) [=사용하다] use (3) [모자(hat)·안경(glasses) 등] wear, put on (3) [우산(umbrella) 등] put up (4) [맛)taste)] bitter (5) [비유적(metaphorical)] bitter (6) employ; hire (7)  [신경((nerve)•힘(strength)•에너지(energy)] exert oneself; apply [use] force; use one's strength [energy]

- 그는 모자를 거꾸로 쓰고 있었다 : He was wearing his cap backwards

- 우산을 쓰다 : put up an umbrella

- 커피가 너무 쓰다 : The coffee is too bitter

- 그녀에게 번번히 퇴짜를 맞으니 입맛이 쓰다 : I'm bitter about being turned down by her every time

* 써 : 쓰(the stem of 쓰다; 으 erased before 어) + -어(a non-honourific descriptive verb ending suffix)

* 씁니다 : 쓰(the stem of 쓰다)+ -ㅂ니다(an honourific descriptive verb ending suffix by '-ㅂ')

* an adjective + -다 / -네 / -어 / -는데 : a non-honourific descriptive adjective ending suffix

* an adjective + -네 / -어 / -는데 + -요 : an honourific descriptive ending suffix

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