足を踏むつもりはなかったのです。

foot; leg; gait; pace; bottom structural component (i.e. radical) of a kanji; means of transportation; money; coin

indicates direct object of action; indicates subject of causative expression; indicates an area traversed; indicates time (period) over which action takes place; indicates point of departure or separation of action; indicates object of desire, like, hate, etc.

to step on; to tread on; to experience; to undergo; to estimate; to value; to appraise; to rhyme; to inherit (the throne, etc.); to follow (rules, morals, principles, etc.)

intention; plan; conviction; belief

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

nonexistent; not being (there); unpossessed; unowned; not had; unique; indicates negation, inexperience, unnecessariness or impossibility; not ...; to not be...; to have not ...

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

be; is