ως adverb
hos  hoce: which how, i.e. in that manner (very variously used, as follows)
δε conjunction
de  deh: but, and, etc. -- also, and, but, moreover, now (often unexpressed in English).
οψια adjective - nominative singular feminine
opsios  op'-see-os: late; feminine (as noun) afternoon (early eve) or nightfall (later eve) -- even(-ing, (-tide).
εγενετο verb - second aorist middle deponent indicative - third person singular
ginomai  ghin'-om-ahee: to cause to be (gen-erate), i.e. (reflexively) to become (come into being), used with great latitude (literal, figurative, intensive, etc.)
κατεβησαν verb - second aorist active indicative - third person
katabaino  kat-ab-ah'-ee-no: to descend -- come (get, go, step) down, fall (down).
οι definite article - nominative plural masculine
ho  ho: the definite article; the (sometimes to be supplied, at others omitted, in English idiom) -- the, this, that, one, he, she, it, etc.
μαθηται noun - nominative plural masculine
mathetes  math-ay-tes': a learner, i.e. pupil -- disciple.
αυτου personal pronoun - genitive singular masculine
autos  ow-tos': the reflexive pronoun self, used of the third person , and (with the proper personal pronoun) of the other persons
επι preposition
epi  ep-ee': meaning superimposition (of time, place, order, etc.), as a relation of distribution (with the genitive case), i.e. over, upon, etc.; of rest (with the dative case) at, on, etc.; of direction (with the accusative case) towards, upon, etc.
την definite article - accusative singular feminine
ho  ho: the definite article; the (sometimes to be supplied, at others omitted, in English idiom) -- the, this, that, one, he, she, it, etc.
θαλασσαν noun - accusative singular feminine
thalassa  thal'-as-sah:  the sea (genitive case or specially) -- sea.