Identify the underlined part of speech in the given sentence:
He gavetacitapproval to the plan.

Synonyms: Implicit (নিহিত; চাপা), Implied (ঊহ্য), Unspoken (অকথিত), Implied, (উহ্য), Wordless (শব্দহীন)।
Antonyms: Explicit (পরিষ্কারভাবে ও পরিপূর্ণভাবে প্রকাশিত), Stated (বিবৃত), Spoken (উচ্চারিত), Phonetic (ধ্বনিগত), Expressed (ব্যক্ত)।
Other Forms: Tacitly (adverb) মনে মনে; নীরবে।
Example Sentence: 
1. He gave tacit approval to the plan.
2. She felt that she had her parents' tacit approval to borrow the car.

 

Source: Website Lecture