ngu ngốc ngu đần ngớ ngẩn 
stupid like: ngớ ngẩn → →
der Schwachsinn ☊ 
điều ngớ ngẩn ☊ 
☊ a silly idea ☊ silly ☊
That was a silly thing to do! ☊ silly ☊
Her work is full of silly mistakes. ☊ silly ☊
'I can walk home.' 'Don't be silly—it's much too far!' ☊ silly ☊
You silly boy! ☊ silly ☊
How silly of me to expect them to help! ☊ silly ☊
a silly sense of humour ☊ silly ☊
a silly game ☊ silly ☊
I feel silly in these clothes. ☊ silly ☊
I got it for a silly price (= very cheap). ☊ silly ☊
We had to wear these silly little hats. ☊ silly ☊
Why worry about a silly thing like that? ☊ silly ☊
worry sb with sth: Don't keep worrying him with a lot of silly questions. ☊ worry ☊