Let's learn about "힘내"

힘내 / 힘내자 : Cheer up; Do your best; Hang in there

See : https://m.blog.naver.com/wsekorea/221763157717

[other expressions]

<the followings indicate "Please" or "Let's">

- 힘내자. (to younger people or friends)

- 힘내. (to younger people or friends)

- 힘내요. (honourific by ‘요’)

- 힘냅시다. (more honourific by ‘시’)

- 힘내십시다. (formal; more honourific by ‘시’)

<the followings indicate "Please">

- 힘내세요. (more honourific by ‘시’)

- 힘내셔요. (more honourific by ‘시’)

- 힘내시지요. (more honourific by ‘시’)

- 힘내시죠. (more honourific by ‘시’; -시죠 is a short form of -시지요)

[explanations]

* 힘내다 : cheer up <-- 힘(strength; power; vigour) + 내다(come out; bring out; pull out)

* 힘 : (1) [=체력] (physical) strength; energy; force; might; power (2) [=물리적인 힘] force; power; energy (3) [=작용] agency; action (4) [=권세·위력] power; force; authority; sway; influence; weight (5) [=원기] vigor; nerve; heart; courage; pep; ginger (6) [=강세] force; stress; emphasis (7) [=노력] efforts; labor; exertions; endeavors (8) [=효력·효과] efficacy; effectiveness; effect (9) [=조력] assistance; aid; help; support; good offices; service (10) [=능력] ability; power; faculty; capability; capacity; [=재산] means (11) [=공헌] contribution; service

<idioms about "힘">

* 힘에 부치다 ＝힘겹다

- 그와 씨름하기엔 힘에 부친다 : I am not strong enough to wrestle with him

- 그 일은 내 힘에 부치는 일이다 : The job is beyond my ability

- 이것을 들어올리는 것은 내 힘에 부친다 : It is impossible for me[I don't have the strength] to lift this

* 힘내자 : 힘내(the stem of  힘내다) + -자(a non-honourific propositive verb ending suffix means "Let's ~")

* 힘내 : 힘내(the stem of  힘내다; 내 + -어 contracted into 내) + -어(a non-honourific propositive verb ending suffix means "Let's ~")

* 힘내요 : 힘내(the stem of  힘내다; 내 + -어 contracted into 내) + -어(a propositive verb ending suffix means "Let's ~") + -요(an honourific verb ending suffix)

* 힘냅시다 : 힘내(the stem of  힘내다)  + -ㅂ시다(a propositive honourific verb ending suffix means "Let's ~")

* 힘내십시다 : 힘내(the stem of  힘내다) + -시(a suffix makes a verb more honourific) + -ㅂ시다(a propositive honourific verb ending suffix means "Let's ~")

* a verb + -자 / -어 : a non-honourific propositive verb ending suffix means "Let's ~"

* a verb + -어 + -요 : an honourific verb ending suffix)

* a verb + -십시다 / -ㅂ시다 : an honourific propositive verb ending suffix means "Let's ~" by '-요' / '-ㅂ'

* 힘내세요 : 힘내(the stem of 힘내다) + -시(a suffix makes a verb more honourific) + -어(a propositive verb ending suffix means "please ~") + -요(an honourific verb ending suffix)

* 힘내셔요 : 힘내(the stem of 힘내다) + -시(a suffix makes a verb more honourific) + -여(a propositive verb ending suffix means "please ~") + -요(an honourific verb ending suffix)

* 힘내시지요 : 힘내(the stem of  힘내다) + -시(a suffix makes a verb more honourific) + -지(a propositive verb ending suffix means "Let's ~") + -요(an honourific verb ending suffix)

* a verb + -세요 / -셔요 / -시지요 / -시죠 : an honourific propositive verb ending suffix means "Let's ~" by '-요' / '-ㅂ'