What does ハイサイ mean in Okinawan Japanese, and why do women say ハーイタイ instead?

In standard Japanese, こんにちは works at any time of day. In Okinawa’s うちなーぐち (Okinawan dialect), the everyday hello splits by the speaker’s gender: men say ハイサイ, women say ハーイタイ. Neither changes with the time of day the way こんにちは, おはよう, and こんばんは do — one word covers morning to night, and it even works for answering the phone.

The clip’s teacher adds a reassurance for learners: women don’t have to say ハーイタイ every single time, so it’s fine not to switch strictly by gender in casual speech. Historically, both forms trace back to the Ryukyu Kingdom and were originally commoners' speech — which is why some older speakers near Shuri still treat them as words for peers rather than for addressing someone older or of higher status.