Matthew 17:21

Howbeit this kind goeth not out but by prayer and fasting.
Word Reference
Original Word Definitions
τοῦτο
G5124
touto
that thing
  • that (thing), this (thing)
δὲ
G1161
de
but, and, etc
  • but, moreover, and, etc.
τὸ
G3588
ho
the (sometimes to be supplied, at others omitted, in English idiom)
  • this, that, these, etc. Only significant renderings other than ___%___the___%___ counted
γένος
G1085
genos
___%___kin___%___ (abstract or concrete, literal or figurative, individual or collective)
  • race
    • offspring
    • "family"stock, race, nation
      • i.e., nationality or descent from a particular people
      the aggregate of many individuals of the same nature, kind, sort
οὐκ
G3756
ou
the absolute negative (compare G3361) adverb; no or not
  • no, not
ἐκπορεύεται
G1607
ekporeuomai
to depart, be discharged, proceed, project
  • to go forth, go out, depart
  • "metaphorically
    • to come forth, to issue, to proceed
      • of feelings, affections, deeds, sayings
      to flow forth
      • of a river
      to project, from the mouth of one"to spread abroad, of a rumour
εἰ
G1487
ei
if, whether, that, etc
  • if, whether
μὴ
G3361
(adverb) not, (conjunction) lest; also (as an interrogative implying a negative answer (whereas G3756 expects an affirmative one)) whether
  • no, not lest
ἐν
G1722
en
___%___in,___%___ at, (up-)on, by, etc
  • in, by, with
προσευχῇ
G4335
proseuchē
prayer (worship); by implication, an oratory (chapel)
  • prayer addressed to God
  • "a place set apart or suited for the offering of prayer
    • a synagogue
    • "a place in the open air where the Jews were wont to pray, outside the cities, where they had no synagogue
      • such places were situated upon the bank of a stream or the shore of a sea, where there was a supply of water for washing the hands before prayer
καὶ
G2532
kai
and, also, even, so then, too, etc.; often used in connection (or composition) with other particles or small words
  • and, also, even, indeed, but
νηστείᾳ
G3521
nēsteia
abstinence (from lack of food, or voluntary and religious); specially, the fast of the Day of Atonement
  • a fasting, fast
    • a voluntary, as a religious exercise
      • of private fasting
      • "the public fast as prescribed by the Mosaic Law and kept yearly on the great day of atonement, the tenth of the month of Tisri (the month Tisri comprises a part of our September and October); the fast accordingly, occurred in the autumn when navigation was usually dangerous on account of storms
      a fasting caused by want or poverty

τοῦτο δὲ τὸ γένος οὐκ ἐκπορεύεται εἰ μὴ ἐν προσευχῇ καὶ νηστείᾳ
21
Howbeit this kind goeth not out but by prayer and fasting.