鶏小屋など、鳥がねぐらにする床や地面から持ち上げられた「格子」で、「飛ばしてまた飛ばす」という意味で、飛び越えたり、跳ねたり、スキップしたりして踏まないように注意し、物質を吹き飛ばして放出する。鶏などの鳥はねぐらにいる間、口を開けて眠り、眠っている間に大量の糞便を自発的に排泄する。糞は通常、下の階まで滴り落ちるが、その経路に沿っているすべての人にくっつく。鶏が寝るときに止まるための地面から離れた高さの柵として使われる木の枝：
「本能的に、鶏は利用できる最も高い場所に止まりたい（「寝床に就く」）ので、眠っている間は保護と暖かさのために群れで集まることを望みます。鶏の生活空間を設計する際に鶏の本能に配慮すれば、鶏はより幸せになります。鶏小屋の中に複数の止まり木を設置し、一部が他の止まり木よりも高い場合、鶏は最も高い（「最適な」）場所を奪い合う可能性があります。これを避けるには、止まり木をすべて同じ高さに保ちます。…鶏の止まり木は非常に単純な板です…またはクローゼットに置くような木製の物干し竿、または直径約2〜3㏌の太い木の枝でもかまいません。」
　【　https://www.pet-chicken.com/why-chickens-need-a-roost/　2014-09-29　】
前述の説明にかかわらず、「小柄な人が座った状態で、勃起を繰り返しながらねじり上げ、前方に突き出して飛ぶ」ということは、最終的には飛沫を撒き散らし、弾幕を発射する結果となり、王朝時代の中国では、性的奉仕提供者の足が、跳ねたり、スキップしたり、ジャンプしたり、跳んだり、空中で手を振ったり、顧客に飛ばされたりしているように見えることを表します。この象形文字が「2つの分離した足（羽）」のように見える構成要素を使用しているのは、おそらく偶然ではありません。（升）「勃起したねじれの繰り返しの上下動、勃起した棒の配列の上下動」によって使用された後、裏返し（「反転」）されています。重要なことに、文字通りの鳥の翼は反転すると飛行器具として機能しないため、この象形文字は顧客が1人または2人飛んだ後の足の分離を示しているようです。実際、鳥の翼を反転すると骨が折れる傾向があります…

A「grid raised off the floor or ground where birds roost」such as in a chicken coop, with「to let fly and let it fly again」meaning TO SCATTER, be careful NOT TO STEP upon by JUMPING OVER, HOPPING or SKIPPING over, to LAUNCH as with a blasting flow and discharge of material. Birds such as chickens sleep with open mouths while roosting, and during sleep the animals spontaneously defecate large amounts of fecal matter. Shit normally trickles down to all lower levels but sticks to everyone along its path. Wooden branches used as rails elevated off the ground for hens to roost upon when sleeping:
　「By instinct, chickens want to roost ('go to bed') in the highest point available, and be gathered together in a group for protection and warmth while they sleep. Your chickens will be happier animals if you play to their instincts when you are designing their living space. If you were to place multiple roosts inside your coop with some higher than others, they may fight to get the highest ('best') spots: to avoid this, you keep the roost at all the same level. …A chicken roost is a very simple board…or a wooden clothes rod like you would put in a closet, or even a thick tree branch that is about [2-3 inches in diameter].」
　　[　https://www.pet-chicken.com/why-chickens-need-a-roost/ 2014-09-29　]　
　Regardless of that previous explanation,「flying with repeated erection screwing and thrusting forward with small sitting person」also would eventually result in SCATTERING droplets, LAUNCHING a barrage, and in dynastic China would describe the foot or feet of a service provider that appear to HOP, SKIP, JUMP, LEAP, WAVE IN THE AIR, or be SENT FLYING by clients. It is perhaps no coincidence this glyph uses elements that appear to be「two dis-integrated feet」(羽) that have been turned inside out ('everted') after use by「repeated bobbing head of erection screwing, array of erect rods bobbing」(升). Significantly, literal bird wings do not function as flight instruments when everted, so the glyph seems to indicate dis-integrated feet after the flight of a client, or two. In fact, everting a bird's wings has the tendency to break the bones…

Modern definitions (that generally disregard history) …excluding politically incorrect concepts and other meanings deemed offensive today; may list only pigeonholed definitions, euphemisms, or meaninglless mnemonics)
Chinese: to fly
Japanese: rook, flying, leaping, flight, naught, zero, oh, flying fish, running out of points ), game ending due to a player running out of points, to jump, to leap, to spring, to bound, to hop, to fly, to soar, selling or divesting in unwanted stocks, hiding bad loans, to fire, to hurl, to launch, to make fly, to skip over, to omit, to drop, to run or drive fast, to gallop, to spread a rumour, to tell a story, to tell a joke, to remove, to get rid of, to transfer, to attack, to jeer at, splash, spray, soaring, to fly about, to flutter about, to flit about, to fly past each other, jumping match, running match, to jump at, to be attracted by
Unihan extended: fly; go quickly; dart; high
EDRDG: fly; skip (pages); scatter

Used within names (nanori)
あす　･　とび