There are books in my collection which I’ve owned for decades and which spend most of their working lives sitting quietly on a shelf, usually in a back row, thinking their dusty thoughts until, once every five or ten years, I need to consult them, at which point, having determined after some trial and error behind which of the limelight-hogging volumes they are to be found, I pull them out and locate the desired information. Such a book is William Veitch’s Greek Verbs, Irregular and Defective. (I have linked to the 2001 Adamant reprint of the 1871 third edition, which seems virtually identical to my 1967 Georg Olms reprint of the 1887 fourth edition; there are a number of cheaper reprints of the 1848 first edition, like this, but getting one would be false economy—the book was much expanded and improved in later editions.) Veitch (pronounced /viyč/, “veech”) was an interesting guy; you can read a nice eight-page obit of the “Old Grammarian” here (“There passed away on the 8th of July last one of Edinburgh’s notabilities… Dr. Veitch was born in 1794, and died therefore at the good old age of ninety-one…. He came of a good Border stock. His father was a Seceder, and a ‘stieve’ one, in the matter of fasting and the religious observances ‘of the most straitest sect’ of Presbyterians….”). But the reason I bring him and his book up is this wonderful entry on page 130 of my edition:
Βδέω To emit an offensive smell, Ar. Plut. 703, βδεῖς Anth. 11, 415; βδέων Ar. Eq. 898; Hierocl. 237, -έουσα Ar. Plut. 693 : fut. (βδέσω) : aor. βδέσε Anth. 11, 242, and ἔβδευσα if correct, Hierocl. 233. 240. 241 (Eberh.) Pass. βδεόμενος Ar. Eq. 900. This verb is, luckily, very limited in its range. Epic, Trag. and genteel prose never name it, but Hierocles, and sometimes Galen professionally of course.
On the history and range of this fine old Indo-European (PIE *pezd-) verb for ‘fart silently,’ see this LH post with its links; as an example of why you should not get a reprint of the first edition, here’s the corresponding entry there (page 37):
ΒΔΕ´Ω To emit an offensive smell, Ar. Plut. 703, Anth. 11, 415 : fut. (βδέσω) : aor. ἔβδεσα Anth. 11, 242.—Pass. βδεόμενος Ar. Eq. 900.