This expression is used to indicate that although something is not really one's first choice, it is fine as the second-best option. This expression is also used when the speaker wants to express a view that anything is fine because he/she does not have any particular preference in mind.

Details

1. When attached to nouns indicating a particular time, 에나 must be used, while both (이)나 and 에나 can be attached to nouns indicating a place.

오후에는 조금 바쁘니까 이따 저녁에나 만납시다.

미국은 너무 머니까 가까운 일본에나 다녀오자.

2. The past tense cannot be used after '(이)나'. Moreover, sentences that end in the imperative or propositive form sound the most natural with this expression.

여행이나 했어요. ✕

여행이나 할까요? ✓

3. This expression should be used together with an expression indicating one's intention or will.

(저는) 여행이나 했어요. ✕

(저는) 여행이나 하고 싶어요. ✕

The expression (이)나 can carry a number of different meanings as described below. It is important to learn them well to avoid confusion.

<i - Used to enumerate or express a choice between two or more things.

저는 돈이 있으면 책이나 CD 사는 것을 좋아합니다.

I like to buy books or CDs when I have money.

2 - Used to indicate that the amount of something is more than expected.

배가 고파서 밥을 3그릇이나 먹 었어요.

I was hungry and ate (as many as) three bowls of rice.

3 - Used to indicate that while something may not be the best choice, it is satisfactory as the second-best option.

우리 심심한데 영화나 봅시다.

We're bored, so let's go to see a movie or something.

Kimchi Reader

It expresses that the choice is not really one's first choice but it is fine as the second best option.

Details

Usage

이나 is added before a counter ending in a consonant
나 is added before a counter that ends in a vowel