ῥέγχος
From LSJ
καὶ παρὰ δύναμιν τολμηταὶ καὶ παρὰ γνώμην κινδυνευταὶ καὶ ἐν τοῖς δεινοῖς εὐέλπιδες → they are bold beyond their strength, venturesome beyond their better judgment, and sanguine in the face of dangers
English (LSJ)
ῥέγχω, ῥεγχώδης,
A v. ῥεγκ-. ῥέδα, ῥέδιον, v. ῥαῖδα, ῥαίδιον. ῥέδδω, v. ῥέζω (A). ῥέεθρον, Ion. and poet. for ῥεῖθρον (q.v.).