They appear to be completely bereft ___ new ideas.

Bereft of: 
English Meaning - Not having (something that is needed, wanted, or expected). 
Bangla Meaning -  বঞ্চিত হওয়া/বিছিন্ন হওয়া (বিমূর্ত কোনো কিছু থেকে)। 

Example Sentences: 
- They appear to be completely bereft of new ideas.
- I am bereft of all expectations. 

Source: 
1. Merriam-Webster Dictionary. 
2. Cambridge Dictionaty.