Breakdown of O líder verificou a bicicleta.
Questions & Answers about O líder verificou a bicicleta.
Because o is the masculine singular definite article, meaning the.
So O líder means the leader.
In Portuguese, articles are used very regularly, often more regularly than in English. You usually cannot just say líder here if you mean the leader in a normal complete sentence.
The accent mark shows where the stress goes: LÍ-der.
Without the accent, the word would not follow normal Portuguese stress expectations. The accent helps you pronounce it correctly.
So the stressed syllable is the first one:
- líder