voimistua — meaning in English

English meaning

batten noun A long, narrow strip of wood or metal used to strengthen, fasten, or hold something in place, especially in construction or on a ship.
deepen verb To make or become deeper.
escalate verb To increase in intensity, size, or seriousness.
strengthen verb To make something stronger, more solid, or more effective.
swell verb To grow bigger, especially by filling with fluid or gas.

voimistua is used for these senses in English:

batten To become better; to improve in condition; especially of animals, by feeding; to fatten up. [from late 16th c.]
deepen (transitive) To make darker or more intense; to darken
deepen (intransitive) To become darker or more intense
escalate (ambitransitive) To increase (something) in extent or intensity; to intensify or step up.
strengthen (transitive) To make strong or stronger; to add strength to; to increase the strength of; to fortify.
swell (transitive) To cause to grow gradually in force or loudness.

noun A long, narrow strip of wood or metal used to strengthen, fasten, or hold something in place, especially in construction or on a ship.
verb To fasten or secure something firmly, typically with battens — especially in the phrase "batten down."
verb Followed by "on": to grow fat or prosper, often at someone else's expense.