キ, いく, いく.つ, いく.ら, い, く
how many, how much, how far, how long, some, several
JLPT3 G7 S12 F1725
A variant form of 我# (bladed weapon) + an obsolete character doubling 幺 slender thread → slice threads repeatedly, *little by little*, causing them to become *minute* and *almost equal* in size → *slight*; *(a) few*; *some* (← minute in size or quantity). Also, *almost*. *How much/many* and *which* are borrowed meanings.
[Full Kanji Etymology List]