4	*Okahu a uka ui hetuu.*	1	⅔
5	*ra tahai a uo.*	2
6	*ahu akapu a mata kurakura.*	3
7	*kihikihi rau mea a rapa rau renga*	4
8	*renga a tini a toto renga*	5
9	*vai a mei u(h)i kapokapo.*	6
10	*rua a ngau a nua ngirongiro.*	7	⅓
11	*roro hau a mana ai rea.*	8
12	*vai poko aa raa mata turu*	9
13	*ko te hereke a kino ariki*	10

Hetuu we know, it means 'star', and ui can be 'to look out for':

Hetu, hetu'u

Hetu 1. To (make) sound; figuratively: famous, renowned. 2. To crumble into embers (of a bonfire). Hetu'u. Star, planet; hetu'u popohaga morning star; hetu'u ahiahi evening star; hetu'u viri meteorite. Vanaga.

Hetu 1. Star (heetuu); hetu rere, meteor; hetu pupura, planet. P Pau.: hetu, star. Mgv.: etu, id. Mq.: fetu, hetu, id. Ta.: fetu, fetia, id. The alternative form fetia in Tahiti, now the only one in common use, need not be regarded as an anomaly in mutation. It seems to derive from Paumotu fetika, a planet. Its introduction into Tahiti is due to the fashion of accepting Paumotu vocables which arose when the house of Pomare came into power. 2. Capital letter (? he tu). 3. To amuse. 4. To stamp the feet. Hetuhetu, to calk, to strike the water. Hetuke, sea urchin. Churchill.

Ui, û'i

Ui. To ask. Vanaga.

Û'i. To look, to look at (ki); e-û'i koe! look out! Vanaga.

Ui. 1. Question, to interrogate, to ask (ue). Uiui, to ask questions. 2. To spy, to inspect, to look at, to perceive; tagata ui, visitor. Churchill.

Maybe the name says that one should look for a star, maybe for Alphard (Ana-heu-heu-po). Kahukahu o heke means an octopus hiding in his ink, which might be alluded to in O-kahu.

"Okahu is located next to the cemetery of Hanga Roa ... The second name is used as the name of a place closer to the ocean where the 'old ones' are said to have observed the stars. This is the same place that was shown to Métraux as 'the-cave-where-stars-are-seen' (ana ui hetuu) and from which he received information about stars that bring danger ... The name calls to mind 'the-rock-seeing-stars' (ko te papa ui hetuu) on the eastern tip of Poike, where another observatory was located ..." (Barthel 2)

A rock at Poike in contrast to a cave at the other end of the island evidently is significant. Likewise it may be no coincidence that Okahu is located close to a cemetery. West is where the stars are going down.

Kahu

Clothing, dress, habit, cloth, curtain, vestment, veil, shirt, sheet; kahu hakaviri, shroud; kahu nui, gown; rima o te kahu, sleeve; kahu rahirahi, muslin; hare kahi, tent; horega kahu, shirt; hakarivariva ki te kahu, toilet; rakai ki te kahu, toilet; patu ki te kahu, to undress; kahu oruga, royal sail; kahu hakatepetepe, jib; kahu nui, foresail; hakatopa ki te kahu, to set sail; (hecki keho, canvas T.) P Pau.: kahu, dress, garment, native cloth. Mgv.: kahu, cloth, stuff, garment, clothing. Mq.: kahu, habit, vestment, stuff, tunic. Ta.: ahu, cloth in general, vestment, mantle. Chuchill.

The meaning of O-kahu in item 4 is probably that the 'old light' has been covered by a 'black cloth'. The time has come to wait for a new light.

Interestingly, the Tahitian kahu has become ahu, which word once again leads us to think about graves:

Ahu

1. Funerary monument with niches holding the skeletons of the dead. 2. Generic term for a grave, a tomb merely enclosed with stones. 3. Stone platform, with or without graves. 4. Elevated seat, throne. 5. Swollen; to swell up: ku-ahu-á tooku va'e, my foot is swollen; ananake te raá e-tagi-era te ûka riva mo toona matu'a ka-ahu ahu-ró te mata, every day the daughter cried for her parents until her eyes were quite swollen. Vanaga.

1. To transfer, to transplant, to take up by the roots. 2. To puff up, to swell, a swelling, protuberance; gutu ahu, swollen lips; ahuahu, to swell, plump, elephantiasis, dropsy; ahuahu pupuhi, amplitude; manava ahuahu, indigestion. 3. Paralysis. 4. A carved god of dancing, brought forth only on rare occasions and held of great potency. Ahuahu, inflammation. Ahukarukaru (ahu 2 - karukaru), dropsy. Churchill.

Swollen (ahu) then could lead us on to Gb5-12 (Hanga Te Pau):


Gb5-6	Gb5-7	Gb5-8	Gb5-9	Gb5-10	Gb5-11	Gb5-12
360	361	362	363	364	365	366

Pau

1. To run out (food, water): ekó pau te kai, te vai, is said when there is an abundance of food or water, and there is no fear of running out. Puna pau, a small natural well near the quarry where the 'hats' (pukao) were made; it was so called because only a little water could be drawn from it every day and it ran dry very soon. 2. Va'e pau, clubfoot. Paupau: Curved. Vanaga.

1. Hakapau, to pierce (cf. takapau, to thrust into). Pau.: pau, a cut, a wound, bruised, black and blue. 2. Resin. Mq.: epau, resin. Ta.: tepau, gum, pitch, resin. (Paupau) Hakapaupau, grimace, ironry, to grin. 3. Paura (powder), gunpowder. 4. Pau.: paupau, breathless. Ta.: paupau, id. 5. Ta.: pau, consumed, expended. Sa.: pau, to come to an end. Ma.: pau, finished. 6. Ta.: pau, to wet one another. Mq.: pau, to moisten. Churchill.

Paua or pāua is the Māori name given to three species of large edible sea snails, marine gastropod molluscs which belong to the family Haliotidae (genus Haliotis), known in the USA as abalone, and in the UK as ormer shells ... Wikipedia.