床板

床板

1. bedboard

• 鋪板／铺板 (pùbǎn)
• (Sichuan) 床板板, 床板子
• (Hokkien) 床枋, 眠床枋, 鋪枋／铺枋

Compound of 床 (yuka, “floor”) +‎ 板 (ita, “board”).[1][2][3][4][5][6] First cited to 1758.[1]

• (Tokyo) ゆかいた [yùkáítá] (Heiban – [0])[2][3][7]
• IPA^(key): [jɯ̟ᵝka̠ita̠]

床(ゆか)板(いた) • (yukaita) 

1. [from 1758] floorboard, wooden flooring

Compound of 床 (toko, “raised area”, short for 床の間 (toko no ma), a kind of raised alcove in a larger room) +‎ 板 (ita, “board”).[1][2][3][4][5] First cited to 1638.[1]

• (Tokyo) とこいた [tòkóítá] (Heiban – [0])[2][3][7]
• IPA^(key): [to̞ko̞ita̠]

床(とこ)板(いた) • (tokoita) 

1. [from 1638] floorboard, wooden flooring (limited to just the flooring of a 床の間 (toko no ma) alcove)

Possibly from written Chinese 床板 (chuángbǎn, literally “bed + board”). However, given the difference in meaning and the late appearance of the Japanese term (first cited in 1928[1]), the Japanese term is perhaps more likely a coinage in Japanese from Middle Chinese-derived elements, as a compound of 床 (shō, “floor”) +‎ 板 (ban, “board”).

• (Tokyo) しょーばん [shòóbáń] (Heiban – [0])[2]
• IPA^(key): [ɕo̞ːbã̠ɴ]

床(しょう)板(ばん) • (shōban) ^{←しやうばん (syauban)?}

1. [from 1928] floorboard, wooden flooring

As an on'yomi term, this appears to be used in more restricted technical contexts than yukaita.

Homophonous with, and occasionally conflated with, 床版 (shōban, “deck (as of a bridge); floor slab (uncommon synonym of スラブ (surabu))”). Some sources even list this as an alternative spelling of 床板 (shōban, “floorboard”),[5] but usage observed online suggests that these are more commonly treated as separate terms.