Select one-word substitution for the given words: Very attentive to and concerned about accuracy and detail.

• Fastidious:
English Meaning: Very attentive to and concerned about accuracy and detail.
Bangla Meaning: খুঁতখুঁতে; দোষ ধরতে তৎপর।

অন্যদিকে,
• Maiden: 
English Meaning: an unmarried girl or young woman.
Bangla Meaning: (আক্ষরিক অর্থ) বালিকা; অবিবাহিতা তরুণী।

• Mediaeval: 
English Meaning: relating to the Middle Ages.
Bangla Meaning: মধ্যযুগীয়।
 
• Precarious:
English Meaning:  not securely held or in position; dangerously likely to fall or collapse.
Bangla Meaning: (আনুষ্ঠানিক) অনিশ্চিত; আশঙ্কাজনক; দৈবাধীন।

Source:
1. Accessible Dictionary.
2. Merriam-webster Dictionary.
3. English-bangla Dictionary.