私は注意深くアクセルを踏んだ。

I; me; private affairs; personal matter; secrecy; selfishness

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

careful

accelerator; Axel (figure skating jump); axel

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.)