kai (Greek #2532)
and, also, even, so then, too, etc.; often used in connection (or composition) with other particles or small words
KJV usage: and, also, both, but, even, for, if, or, so, that, then, therefore, when, yet.
Pronounce: kahee
Origin: apparently, a primary particle, having a copulative and sometimes also a cumulative force
heis (Greek #1520)
a primary numeral; one
KJV usage: a(-n, -ny, certain), + abundantly, man, one (another), only, other, some. See also 1527, 3367, 3391, 3762.
Pronounce: hice
Origin: (including the neuter (etc.) ἕν)