• 承諾しょうだく — consent; approval; agreeing to a request
• 快諾かいだく — gladly agreeing; willing consent
• 許諾きょだく — permission; authorization (for use or rights)
• 受諾じゅだく — acceptance of terms, an offer, or a request
• 諾否だくひ — yes-or-no decision; acceptance or rejection
• 諾うべなう — to consent; to say yes (literary)

With the speech radical 言 on the left, 諾 shows words that lean toward acceptance. It carries the idea of hearing someone out and then giving a clear, deliberate “yes.”