Translation:Bread tastes bad.
I agreee bread is great! Only SOME bread is good though you have to get good brands. Also garlic bread is A-M-A-Z-I-N-G
TL;DR: 맛없다 is read as a compound word that just so happens to be written without a space because arbitrary rules; the ㅅ does not carry over to the next syllable because 맛 and 없다 are two separate units. 맛있다 is not perceived to be a compound word, but one unit, so it’s pronounced (nearly 100% of the time) as [마싣따]; the ㅅ carries over to the next syllable.
Read more here: https://www.duolingo.com/comment/24520049
I’m not sure which part is confusing you, so here’s the whole thing:
⟨빠ᇰ은 맛없습니다⟩ is pronounced [빠ᅌᅳᆫ 마덥씀니다]. (Note that I’ve written it in a way that distinguishes the silent ⟨ㅇ⟩ from the nasal velar ⟨ㆁ⟩.) The pronunciation rules apply in 3 stages:
- 빠ᇰ은 맛 없습니다 ← analyzed segments
- 빠ᇰ은 맛 업습니다 ← consonant cluster reduction
- 빠ᅌᅳᆫ 마 덥씀니다 ← enchaînement, consonant coda reduction, and other sound changes
Notice that in step 3, /ㅅ/ becomes [ㄷ]. The analysis of ⟨맛⟩ as a separate unit prevents the intact migration of /ㅅ/ to the next syllable (enchaînement), so it is first reduced to [ㄷ] before migrating to the next syllable as an initial.
Also, /ㅌ/ is not /t/; it is /tʰ/. Finals /ㅌ/, /ㅅ/, /ㅆ/, /ㅈ/, and /ㅊ/ all reduce to [ㄷ], the real /t/. The ⟨ㅌ⟩ at the beginning of a syllable is only the same as ⟨t⟩ at the beginning of an English word, but the ⟨ㅌ⟩ at the end of a syllable can only be firstly reduced to [ㄷ], which is ⟨t⟩ at the end of an English syllable. Read this for more information: What Pronunciations the Consonants are NOT.
There is also more above if you are willing to read lots. The end of my post there also links to https://forum.duolingo.com/comment/24520049.
맛없다 means that it has no taste, or tastes bad. 맛있오 meand that it tastes good. The 없 makes it negative. Si the basic verb 있어요 (to be/to exist/to have) can be made negative be changing it to 없어요 (do not have/does not exist/to not be). 안 can also be used to make verbs and adjectives negative, it's just one of those things where sometimes you'd say 없 or you'd say 안. And in this case, 맛없다 is the combination of two words 맛, which is an adjective, and 없다 which is a verb.
Just like with tasting good and bad, interesting and uninteresting also use the verbs 있다 and 없다 which indicate existence and absence respectively. According to Duolingo interesting is 재미있다 and uninteresting is 재미없다, but Google implies that those can also mean things like fun or funny.