This is the 109th most frequent Russian word.
почти
Almost.
The word 'почти' is used here to imply that the action was nearly completed but not entirely.
Я почти закончил домашнее задание.
I almost finished my homework.
In this sentence, 'почти' modifies the subject to indicate that the majority, but not all, fit the description.
Почти все согласились с его предложением.
Almost everyone agreed with his proposal.
Here, 'почти' is used to describe a time-related context, indicating slight deviation from being punctual.