(n)a screw (often without a head) that fits into the boss or hub of a wheel or cam etc. and prevents motion of the part relative to the shaft on which it is mounted
[どおり, doori](n-adv, n) (1) avenue; street; way; road; (2) coming and going; street traffic; (3) flow (of water, air, etc.); (4) transmission (of sound); reach (e.g. of voice); (5) fame; reputation; popularity; (6) the same status or way; as (e.g. as expected, as I said); (7) understanding; comprehension; (ctr) (8) counter for sets of things; counter for methods, ways, types; (P)#493[Add to Longdo]
[つい, tsui](n) (1) pair; couple; set; (2) (See 対句) antithesis; (ctr) (3) counter for items that come in pairs; (4) counter for sets (of clothes, small furniture, utensils, etc.); (P)#879[Add to Longdo]