к

Usage notes
The phoneme becomes  when adjacent to back vowels (,, , and ) in non-loanwords. In loanwords, it is always.

Etymology 2
.

Preposition

 * 1) to, toward
 * 2) by, for
 * 3) against
 * 1) by, for
 * 2) against
 * 1) against
 * 1) against

Usage notes
is used before words beginning with certain awkward consonant clusters such as, , , and.

Etymology 3
.

Prefix

 * 1) k, kilo- x 1000

Etymology 2
, from.

Preposition

 * 1) to
 * 2) towards

Usage notes
Although both and  can be used synonymously,  must take the alternative form  in the following environment:
 * before /к, г, х/:
 * ка граду - to the city
 * ка горе - towards above
 * ка хладу - toward the shade

Etymology 2
.

Preposition

 * 1) to, toward
 * 2) by, for
 * 3) against