六

Common noun

the six directions (north, south, east, west, up, and down)

Prefix

hexagonal

the Six Ksitigarbhas (one for each of the six realms)

Buddhism

purification of the six roots of perception

six-chambered (revolver)

endless circle of transmigration in the six posthumous worlds

sextant

hexagonal building

66-odd provinces of old Japan; 60-odd states

Geometry

hexahedron

crest of the Sanada clan (featuring six sen coins, trad. to pay for crossing the Sanzu River)

Buddhism

six consciousnesses (i.e. functions of the six sense organs: seeing, hearing, smelling, tasting, touching, and reasoning)

Historical term

Six Dynasties (of China: Eastern Wu, Eastern Jin, Song, Qi, Liang, Chen)

calligraphic style of the Six Dynasties period

six forms of the Shi Jing (genre: folk song, festal song, hymn; style: narrative, explicit comparison, implicit comparison)

six forms of waka (allegorical, enumerative, metaphorical, allusive, plain, congratulatory)

six principles of calligraphy

six classes of kanji characters

sextuplets

Buddhism

six sense organs (eyes, ears, nose, tongue, body, and mind)

hexagonal wrench; Allen key

the six virtues (perfections) a Buddha elect practices to attain supreme enlightenment

the six written characters of Buddha's name (used in prayer)

Astronomy

The Pleiades

The Six Secret Teachings and The Three Strategies of Huang Shigong (two ancient Chinese military treatises)

secrets (of the art of war, etc.); mysteries

age sixty; one's sixties

six external causes of illness in traditional Chinese medicine (wind, cold, fire/heat, dampness, dryness, heat of summer)

Buddhist pilgrim (carrying 66 copies of the Lotus Sutra to be left at sites across Japan)

sixth of nine traditional astrological signs (corresponding to Venus and north-west)