形容詞 presumptuous:

1. excessively forward
   同義詞：assumptive, assuming

1. Having or showing excessive and arrogant self-confidence; presumptuous.
   冒昧的，放肆的擁有或顯示過分的或傲慢的自信的; 自行其事的
2. I dislike that presumptuous young man.
   我不喜歡那個自以為是的年輕人。

pre.sump.tu.ous

adj.（形容詞）
Going beyond what is right or proper; excessively forward.
太過分的；放肆的

來源：
Middle English
中古英語
from Old French presumptueux
源自 古法語 presumptueux
from Late Latin presômptuôsus
源自 后期拉丁語 presômptuôsus
variant of praesômptiôsus
praesômptiôsus的變體
from praesômptiô [presumption] * see presumption
源自 praesômptiô [自行其事；傲慢] *參見 presumption

【引伸】
presump.tuously
adv.（副詞）
presump.tuousness
n.（名詞）