Translation:The child is clean.
When the last letter of a syllable is ㅅ, check the next letter of the next syllable if it is consonant or vowel :) when consonant, it is read as 't' sound. But when it is a vowel, read it as 's'.
This is the phonetic Hangeul: [깨끄타다]
Good way to find out is to type the real Hangeul + phonetic hangeul in Google as follows:
깨끗하다 phonetic hangeul
Is the the audio for the double consonant 깨 wrong, or...? When I looked up the pronunication of ㄲ - everything I've seen suggests that it's more aspirated and a slightly higher tone, but not actually repeated like this. Is this word an exception? Or is there another rule I don't know about?