σοῦσθαι
From LSJ
καὶ τὸ σιγᾶν πολλάκις ἐστὶ σοφώτατον ἀνθρώπῳ νοῆσαι → and silence is often the wisest thing for a man to heed, and often is man's best wisdom to be silent, and often keeping silent is the wisest thing for a man to heed
English (LSJ)
σοῦσθε, σούσθω, A v. σεύω.
Greek (Liddell-Scott)
σοῦσθαι: σοῦσθε, σούσσω, ἴδε σεύω.
French (Bailly abrégé)
inf. prés. Moy. de σοῦμαι, c. σεύομαι, v. σεύω.
Greek Monotonic
σοῦσθαι: Μέσ. απαρ. του σεύω· σούσθω, σοῦσθε, γʹ ενικ. και βʹ πληθ. προστ.
Russian (Dvoretsky)
σοῦσθαι: inf. к σοῦμαι.