-lengtha suffixal use of length indicating extent to the position specified, as in ankle-length, knee-length.
-length
combining form
- reaching up to or down to the place specified表示“长达…的”, “齐…长的”：
-
knee-length.
- ■ of the size, duration, or extent specified表示某一长度、持续时间：
-
full-length
medium-length
feature-length.