問英文字,唔該,1個英文字

would it be

"senile" (read c-nine-o)
means 老邁的

or Sydney (read sit-ne)
means 悉尼

or synod (read sin-nod)
means 大會

說的是sit tight嗎?

1. 不動

如果你的車子拋錨, 就留在原處不動, 等警察來。
If your car breaks down, just sit tight and wait for the police to come along.


2. 耐心等待; 靜待事態的發展 <這個我想是idiom

由於暴風雪來襲, 我們不得不在機場耽擱一天, 靜觀事態的發展。
Due to the blizzard, we had to sit tight at the airport for a day.

爸回去找媽的時候, 他要我們耐心等待。
Dad told us to sit tight while he went back to find Mom.

是Sydney嗎?
可以解作生果[雪梨],或澳洲的首都悉尼.