gerunds

imminent (adj)

about to happen; likely to occur in the very near future

incessant (adj)

continuing without pause or interruption

indignation (n)

anger or annoyance provoked by what is perceived as unfair treatment

inevitable (adj)

certain to happen; unavoidable

melancholic (adj)

feeling or expressing sadness

meticulous (adj)

showing great attention to detail

morose (adj)

having a gloomy or sullen manner; not friendly or sociable

nonchalantly (adv)

in a casually calm and relaxed manner

notorious (adj)

widely known because of bad conduct

obligatory (adj)

required by a legal, moral, or other rule

oblivious (adj)

not aware of or not concerned about what is happening around one

obstinate (adj)

stubbornly refusing to change one's opinion or chosen course of action, despite attempts to persuade one to do so.

ominous (adj)

giving the impression that something bad or unpleasant is going to happen

oscillate (v)

move back and forth, swing, vary