速度のだし過ぎは事故のもとになる。

speed; velocity; rate

indicates possessive; nominalizes verbs and adjectives; substitutes for "ga" in subordinate phrases; (at sentence-end, falling tone) indicates a confident conclusion; (at sentence-end) indicates emotional emphasis; (at sentence-end, rising tone) indicates question

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

accident; incident; trouble; circumstances; reasons

origin; source; base; basis; foundation; root; cause; ingredient; material; (somebody's) side; (somebody's) location; original cost (or capital, principal, etc.); (plant) root; (tree) trunk; first section of a waka; counter for blades of grass, tree trunks, etc., and for falcons (in falconry); handle (chopsticks, brush, etc.); grip

at (place, time); in; on; during; to (direction, state); toward; into; for (purpose); because of (reason); for; with; by; from; as (i.e. in the role of); per; in; for; a (e.g. "once a month"); and; in addition to; if; although

to become; to get; to grow; to be; to reach; to attain; to result in; to prove to be; to consist of; to be composed of; to succeed; to be complete; to change into; to be exchanged for; to play a role; to be promoted; to do ...