This is the 8718th most frequent Russian word.
первоначально
"Initially" or "at first."
In this sentence, 'первоначально' is used as an adverb to denote the original intention or arrangement at the beginning of the planning process.
Первоначально мы планировали провести встречу в понедельник.
Initially, we planned to hold the meeting on Monday.
Here, 'первоначально' describes the original scope or idea of the project when it was first conceived.
Проект первоначально был задуман как небольшое исследование.
The project was initially conceived as a small study.
In this example, 'первоначально' is expressing the initial stance or agreement made by the subject before any potential changes.