θυμιατέον
From LSJ
ἐς δὲ τὰ ἔσχατα νουσήματα αἱ ἔσχαται θεραπεῖαι ἐς ἀκριβείην, κράτισται → for extreme diseases, extreme methods of cure, as to restriction, are most suitable (Corpus Hippocraticum, Aphorisms 1.6.2)
English (LSJ)
one must fumigate, Gp.6.10, Paul.Aeg.6.75.
Greek (Liddell-Scott)
θῡμιᾱτέον: ῥημ. ἐπίθ. τοῦ θυμιάω, δεῖ θυμιᾶν, Γεωπ. 6. 10.