この船は蒸気で動かされている。

this (something or someone close to the speaker (including the speaker), or ideas expressed by the speaker)

ship; boat; watercraft; vessel; steamship; tank; tub; vat; trough; counter for boat-shaped containers (e.g. of sashimi)

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

steam; vapour; vapor; steamship; steamboat; steamer

indicates location of action; at; in; indicates time of action; indicates means of action; cause of effect; by; and then; so; indicates continuing action; indicates certainty, emphasis, etc.

to move; to shift; to stir; to budge; to change position; to inspire; to rouse; to move (e.g. feeling); to influence; to change; to alter; to deny; to operate; to set in motion; to get going; to mobilize (e.g. troops); to mobilise; to deploy; to manage (e.g. funds)