Quick Definition
difficult to carry
Strong's Definition
oppressive
Derivation: from G1418 (δυσ-) and a derivative of G941 (βαστάζω);
KJV Usage: grievous to be borne
Thayer's Greek Lexicon
δυσβάστακτος, δυσβάστακτον (βαστάζω), hard (A. V. grievous) to be borne: Mat_23:4 (T WH text omit; Tr brackets δυσβάστακτος and Luk_11:46 φορτία δυσβάστακτα, said of precepts hard to obey, and irksome. (the Sept. Pro_27:3; Philo, omn. prob. book § 5; Plutarch, quaest. nat. c. 16, 4, p. 915 f.)
Mounce Concise Greek Dictionary
δυσβάστακτος dysbastaktos 1x
difficult or grievous to be borne, oppressive, Luk_11:46
Abbott-Smith Greek Lexicon
δυσ -βάστακτος , -ον
( < βαστάζω ),
[in LXX for H5192 , Pro_27:3 * ;]
hard to be borne: Mat_23:4 ( om . WH , txt ., R , mg .), Luk_11:46 .†
Moulton & Milligan — Vocabulary of the Greek NT
δυσβάστακτος [page 173]
See for the guttural under βαστάξω above. It would seem that the compound was coined (LXX, Philo and Plutarch) when the guttural forms were coming in, so that the older alternative in -στος never took its place.
Liddell-Scott — Intermediate Greek Lexicon
δυσβάστακτος δυσ-βάστακτος, ον [Etym: βαστάζω] "grievous to bear", NTest.
STEPBible — Tyndale Abridged Greek Lexicon
δυσ-βάστακτος, -ον
(βαστάζω), [in LXX for נֵטֶל, Pro.27:3 * ;]
hard to be borne: Mat.23:4 (om. WH, txt., R, mg.), Luk.11:46.†
(AS)