semi-
/ˈsemɪ/prefix
1
- half表示“半”, “一半”：
semicircular.
1.1
- occurring or appearing twice in a specified period表示“特定期间内发生或出现两次的”：
semi-annual.
2
- partly; in some degree or particular表示“部分地”, “有点”：
semi-conscious.
2.1
- almost表示“几乎”：
semi-darkness.
词源
from Latin; related to Greek hemi-.