Questions & Answers about כולנו מחכים ליד השער, כי הטיסה מאוחרת.
כולנו means all of us.
It is made from:
- כול = all
- ־נו = us / our
So literally, it is something like all of us.
In this sentence, כולנו מחכים means we are all waiting or all of us are waiting.
Because the subject is כולנו = all of us, which is plural.
Hebrew present-tense forms agree with the subject in number and often in gender:
- מחכה = waiting (masculine singular)
- מחכה = waiting (feminine singular; same spelling without vowels)
- מחכים = waiting (masculine plural)
- מחכות = waiting (feminine plural)
Since we is plural, the sentence uses מחכים.
Also, masculine plural is often used for a mixed group or when gender is unspecified.