semi-rigid
/ˌsemɪˈrɪdʒɪd/adjective
1- stiff and solid, but not inflexible半刚性的：
a semi-rigid polyethylene hose.
半刚性聚乙烯管。
1.1
- (of an airship) having a stiffened keel attached to a flexible gas container（飞艇）半硬式的。
1.2
- (of an inflatable boat) having a rigid hull and inflatable sponsons（充气艇）半硬的。