From Old English forblāwan (“to blow; blow out; inflate”), equivalent to for- + blow.
forblowen (third-person singular simple present forbloweth, present participle forblowing, simple past forblew, past participle forblowe or forblown)
- to blow (something) about, to drive or toss (as before the wind)
- Tofor the weder forth thei gon,..Forstormed and forblowen sore. — The English Works of John Gower, 1393
- to blow up (something with wind); puff up, inflate
- O, out on richesse with vanyte forblowe. — The Minor Poems of John Lydgate, c1460
- Where is youre boste, or daren ye appere With youre forblowyng vanyte. — The Pilgrimage of the Soul, 1500
- Middle English Dictionary