Quick Definition
ὑποζώννυμι v. I under-gird
Strong's Definition
from 5259 and 2224; to gird under, i.e. frap (a vessel with cables across the keel, sides and deck)
KJV Usage: undergirt
UBS Dictionary of the Greek New Testament
verb | ζώννυμι
54.25 · Maritime Activities
to fasten ropes around, to brace (a technical, nautical term) to brace a ship
UBS Dictionary of the Greek New Testament © United Bible Societies, licensed CC BY-SA 4.0.
Thayer's Greek Lexicon
ὑποζώννυμι; fr. Hdt. down; to under-gird: τὸ πλοῖον, to bind a ship together laterally with ὑποζώματα (Plat. de rep. 10 p. 616 c.), i. e. with girths or cables, to enable it to survive the force of waves and tempest, Acts xxvii. 17 (where see Overbeck [or Hackett ; esp. Smith, Voyage and Shipwreck, etc., pp. 107 sq. 204 sqq. (cf. βοήθεια) }). (Polyb. 27, 3, 3.)
Mounce Concise Greek Dictionary
ὑποζώννυμι hypozōnnymi 1x
to gird under, of persons; to undergird a ship with cables, chains, etc., Acts 27:17*
Abbott-Smith Greek Lexicon
** ὑπο-ζώννυμι
[in LXX: II Mac 3:19 * ;]
to undergird (Hdt., al.; ὑπὸ τ. μάστους, II Mac, l.c.); of a ship, to undergird or frap: Ac 27:17 (v. DB, ext. 367a).†
Liddell-Scott-Jones — Greek-English Lexicon
ὑποζώννυμι (hupozōnnumi) — to undergird. ὑποζώννῡμι (infinitive ὑποζωνύναι in [Refs] and ὑποζωννύω [Refs 2nd c.BC+], undergird, τοὺς ἵππους ῥυτῆρσι [Refs 1st c.AD+]; ὁ ὑπεζωκὼς τὰς πλευράς (i.e. ὑμήν), or absolutely ὁ ὑπεζωκώς, the pleura, [Refs 2nd c.AD+] is expressed in [Refs 2nd c.AD+]; ὑπεζωκότες foetal membranes, [Refs 2nd c.AD+]; lining of the intestines, [Refs 4th c.AD+] —passive, especially in perfect participle, ζειρὰς ὑπεζωμένοι (variant {-ζωσμ-}) girt with ζειραί (which see), [Refs 5th c.BC+] (οι) girt up, [Refs 5th c.BC+] —especially,
II. brace a ship, so as to make her seaworthy [NT+2nd c.BC+]
III. ὑπεζῶσθαι· τὸ εἰς ἄνδρας ἐλθεῖν, Φιλητᾶς, [Refs 5th c.AD+] (probably = come to man's estate).