ho (Greek #3588)
the definite article; the (sometimes to be supplied, at others omitted, in English idiom)
KJV usage: the, this, that, one, he, she, it, etc.
Pronounce: ho
Origin: ἡ (hay), and the neuter τό (to) in all their inflections
semeron (Greek #4594)
on the (i.e. this) day (or night current or just passed); generally, now (i.e. at present, hitherto)
KJV usage: this (to-)day.
Pronounce: say'-mer-on
Origin: neuter (as adverb) of a presumed compound of the article 3588 (t changed to s) and 2250