This is the 1057th most frequent Arabic word.
الأمني
"الأمني" translates to "security-related" or "pertaining to security" in English.
Here, 'الأمني' is an adjective describing the system ('النظام'), indicating its security-related purpose.
النظام الأمني يساعد في الحفاظ على السلام.
The security system helps maintain peace.
In this sentence, 'الأمني' qualifies the investigation ('التحقيق'), stating it pertains to security matters.
التحقيق الأمني كان شاملاً ومفصلاً.
The security investigation was thorough and detailed.
Here, 'الأمني' modifies the challenge ('التحدي'), meaning the challenge is related to security concerns.