confident
Sure of yourself in a healthy, attractive way.
She sounded confident during the interview.
Some people walk into a room and own it. The question is whether you admire the confidence or want them to lower the volume.
If you mean it as a compliment, use confident. Arrogant is always negative.
She spoke up in the meeting — calm, clear, just confident.
He never listens to feedback. Honestly, he's arrogant.
Skip: "self-confident/arrogant person" — Sounds like a textbook exercise. Real people just say confident or arrogant.
Phrase playground
Start with the human feeling, then choose the English that fits the moment.
Sure of yourself in a healthy, attractive way.
She sounded confident during the interview.
Calmly confident, often in a mature or impressive way.
He has a self-assured way of speaking.
Too confident in a show-off way. Less formal than arrogant.
He's talented, but he's getting cocky.
Thinking or acting like you are better than others.
That comment sounded arrogant.
Too proud of yourself, in an irritating way.
Don't be so full of yourself.
Situation check
Compliment
You admire their calm certainty.
She's confident.
Safe and positive.
Polished compliment
More elegant than confident.
He's self-assured.
Good for writing or work.
Criticism
They think they're above everyone.
He's arrogant.
Clearly negative.
Tone switcher
She's confident, not arrogant.
Useful contrast.He comes across as self-assured.
Diplomatic.It may come across as a little overconfident.
Soft criticism.he's getting kinda cocky
Casual criticism.He's so full of himself.
Strong and informal.Don't say this
Instead ofShe is a confident person very much.
SayShe's very confident.
Put very before the adjective.
Instead ofHe is self-confident/arrogant person.
SayHe's confident, but not arrogant.
Use the adjectives directly; the slash version sounds like a worksheet.
Native phrase battle
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Compliment with confident. Criticize with arrogant. Use cocky when you want it sharper.