を守らなくて

must obey or protect

→ を
phrase Rare #37,675
must obey or protect Usually appears in patterns such as を守らなくてはいけない or を守らなくてはならない, meaning “must obey/protect.” Depending on the noun, 守る can mean “obey” rules or laws, or “protect” people. It can also appear in を守らなくてどうする, meaning “what will you do if you don’t obey/protect it?”
JA: 交通ルールを守らなくてはいけません。
EN: You must obey the traffic rules.

どの社会で暮らすにもを守らなくてなりません

No matter what society you live in, you must obey the law.

王がを守らなくてどうする

What good is a king who doesn't protect his people?

— ロード・オブ・ザ・リング/二つの塔 (2002)