~く adjective (archaic):

• uneventful; peaceful; safe - archaism
• easy; simple - archaism

noun / adjectival noun:

• having nothing to do - archaism

noun:

• omen; sign of luck
• origin; history; causation
• dependent arising; doctrine that everything has a cause and there is nothing that arises out of nothing - orig. meaning - abbreviation - Buddhism term ➜ 因縁生起

adverb / ~と adverb / ~する noun:

• feeling refreshed; feeling relieved - onomatopoeia
• neat; tidy; clean

adverb / ~と adverb / ~する noun / adjectival noun:

• frank; open-hearted; plain; simple; light

adverb / ~と adverb:

• completely; entirely

adverb:

• not in the least (with neg. verb); not at all

adjectival noun:

• nothing at all; completely useless; hopeless; awful