IPA: /ˈsɛmɪˌrɪdʒɪd/
KK: /ˈsɛmɪˌrɪdʒɪd/
Partly stiff or firm, but not completely rigid; having some flexibility.
The semirigid structure of the balloon allows it to maintain its shape while still being able to expand.
Semirigid → It is formed from "semi-" (meaning half) and "rigid" (from Latin "rigidus", meaning stiff or hard). The word "semirigid" describes something that is partially stiff or hard, not completely flexible.
Think of something that is 'half' ('semi-') 'stiff' ('rigid') — that's why semirigid means partially stiff.
No commonly confused words.