cos
word
/ˈkɔs/
kawz
/ˈkɔs/
koz
Definition
A very informal shortened form of 'because', used mainly in writing that imitates speech, texting, or casual British English. It gives a reason for something.
Usage & Nuances
Mostly seen in informal writing, texts, and social media; it is much less common in formal writing. Often written as 'cos or 'cause too. Don't confuse it with 'cos' in math, short for 'cosine'.
Spanish: porque - ya que (informal, británico)Portuguese (BR): porque - já que (informal, britânico)Portuguese (PT): porque - já que (informal, britânico)Chinese (Simplified): 因为（非正式英式）Chinese (Traditional): 因為（非正式英式）Hindi: क्योंकि - चूँकि (अनौपचारिक, ब्रिटिश अंग्रेज़ी)Arabic: لأنّ - بما أنّ (غير رسمي، بريطاني)Bengali: কারণ (অফিশিয়াল নয়) - কজ (সংক্ষিপ্ত/ইংরেজি ফর্ম)Russian: потому что (разговорное) - ибо (разговорное)Japanese: だって (カジュアル) - だから (インフォーマル省略)Vietnamese: tại vì (thân mật) - vì (thân mật)Korean: 왜냐하면 (비격식)Turkish: çünkü (samimi)Urdu: کیونکہ (غیر رسمی)Indonesian: soalnya (sangat santai) - karena (santai)
Example Sentences
I stayed home cos I was tired.
basic
We can't go out cos it's raining.
basic
I'm only asking cos I thought you knew him.
natural
Don't laugh — I said it cos I was nervous.
natural
We took a taxi cos there was no time to wait.
natural
She is late cos the bus was slow.
basic