Lankiness is how a person looks and moves when they are very tall and thin, with long arms and long legs that do not quite seem to belong to them yet. It is not only “thin.” A short thin person is not lanky. The picture is someone stretched, a bit loose in the joints, who may bump a doorway or not know where to put their elbows. People say it a lot about teenagers, because bodies can shoot up faster than the person can get used to them. The word can sound fond, or a little teasing, depending on the voice. It is everyday English, not a doctor’s word. The person is lanky; lankiness is that tall, thin, slightly awkward way of being.

瘦高、手長腳長、動作有點笨拙的樣子