

호텔 전화번호를 알아내기 쉽지 않았어요.
[hotʰel t͡ɕʌnwapʌnolɯl alanɛki swipt͈͡ɕi anas͈ʌjo.]
It wasn't easy to find out the hotel's phone number.
가장 싼 항공권을 어떻게 알아냈어요?
[kat͡ɕaŋ s͈an haŋkoŋkwʌnɯl ʌt͈ʌkʰe alanɛs͈ʌjo?]
How did you find the cheapest plane ticket?
축제 날짜를 알아내면 알려 줄게요.
[t͡ɕʰukt͈͡ɕe nalt͈͡ɕalɯl alanɛmjʌn alljʌ t͡ɕulkejo.]
If I find out the festival dates, I'll let you know.
"알아내다" is in the lesson "Vacation" (Level 33), along with 13 other useful words. LinDuo has 180 topic lessons like this one, 2,380 words in total. Every word has an illustration, a transcription and pronunciation in a female and a male voice. Just 10–15 minutes a day is enough to learn them all. Free, and works offline.