originally; primarily — indicating what was the case from the start or the primary intent
本来ならここは静かであるべきだ。
Originally (or ideally), this place should be quiet.
この仕事は本来、二人で行うものだった。
This task was originally meant to be done by two people.
本来の目的を見失ってはいけない。
We must not lose sight of the original purpose.
本来、彼は時間に厳しい人だ。
By nature, he is a punctual person.
essentially; intrinsically; by nature — indicating an inherent or intrinsic property
人間は本来社会的な生き物だ。
Humans are essentially social creatures.
その薬は本来、外用のために作られている。
That medicine was originally made for external use.
本来の性格が次第に表れてきた。
Their true nature gradually came out.
proper; rightful; normal — indicating what is proper, lawful, or expected
本来の手続きに従わなければ、処理は進められない。
If you don't follow the proper procedure, the process can't proceed.
その問題は本来ならば上司が判断するべきだ。
That issue should properly be decided by the boss.