The word 'For' is -

• The word 'For' is - Conjunction + Preposition.

• For (as a preposition)
English Meaning: used as a function word to indicate purpose / used as a function word to indicate an intended goal.
Bangla Meaning: উদ্দেশে; অভিমুখে; লক্ষ্যে; দিকে।

• For (as a conjunction)
English Meaning: for the reason that : on this ground : BECAUSE.
Bangla Meaning: কেননা; যেহেতু; কারণ; বলে।

Source:
1. merriam-webster.
2. Accessible Dictionary by Bangla Academy.