notadictionary.com
我简直不敢相信
→ “I can't believe it — like, seriously, I'm in shock!”
我 wǒ³ = I/me — the speaker is talking about themselves.
简直 jiǎn³zhí² = literally 'just/only', but here it's an intensifier meaning 'absolutely' or 'completely'. It adds emphasis to how unbelievable something is.
简 jiǎn³ = simple/simplex — like 'easy' or 'basic'.
直 zhí² = straight/direct — like 'upright' or 'honest'.
不敢 bù⁴ gǎn³ = dare not/not dare — a common phrase meaning 'can't bring myself to' or 'am too afraid/surprised to'.
不 bù⁴ = not/no — negation particle.
敢 gǎn³ = to dare/to be bold — when combined with 不, it becomes 'not dare'.
相信 xiāng¹xìn⁴ = to believe — literally 'think together' (想 + 信). It means to accept something as true.
相 xiāng¹ = mutual/each other — often used in compound words to indicate interaction.
信 xìn⁴ = trust/believe — the core meaning of 'belief'.