ぐー【五】 : guu | define meaning

Cognate with standard Japanese ご【五】 go "five". Ultimately from Chinese 【五】 "five" (cf. Mandarin wǔ; Cantonese ng5; Eastern Min ngô and ngū; Hokkien gō͘, gǒ͘, ňg, ngó͘, gó͘ and gú; Sino-Korean 오 o; Sino-Vietnamese ngũ), reconstructed for Middle Chinese as *nguX.

Historical Ryukyuan attestations

• Vocabulary of the language spoken at the Great Loo-Choo Island, in the Japan Sea (1818), by Herbert John Clifford, records "Five. Goo (Loo-Choo); Ittítsee (Japan)", "Fifteen. Goónjoo", "Twenty five. Hácoo goónjoo, or goohacoo", "Fifty. Gooshácoo, or gooyácoo", "Years, twenty-five. Neéjoo goo" and "[Names of the hours]. Five. Goo twit'chee".