Count: 0. This search finds no single-word English prepositions that begin with the letter K. Trusted references (Oxford, Cambridge, Merriam‑Webster) and major corpora (COCA, BNC) show no modern, widely accepted preposition starting with K, which is an interesting gap given English’s large set of short function words.

Understand why the result is empty. Most English prepositions are short, high‑frequency function words from Old English or Latin whose forms did not begin with K; K tends to start content words (nouns and verbs) rather than grammatical particles. Historical sound changes and letter distribution make a K‑initial preposition highly unlikely in standard modern English, so none appear in authoritative dictionaries or common usage.

Consider near misses and practical alternatives. Phrases that begin with K — for example “kind of,” “known as,” or “key to” — include a K word but do not make that word the preposition; the actual preposition is “of,” “as,” or “to.” Treat these as related but not qualifying entries. For a useful reference, consult a full A–Z list of prepositions or the common prepositional phrases used in modern English instead.