这家公司因为没有抵押物，只能申请无担保贷款。

The company had to apply for an ___unsecured loan since it lacked collateral.

窗户没关好，被风吹开了。

The window was left ___unsecured and blew open in the breeze.

请不要在未加密的网络上输入密码。

Never enter passwords on an ___unsecured network.