All terms in this list:

impromptu: Improvised; without prior preparation; extemporaneous; unplanned.

ajar: Slightly turned or opened;

tentatively: uncertainly,or hesitantly

tremor: nervous trembling

commence: To begin, start.

beckon: To wave and/or to nod to somebody with the intention to make the person come closer.

gnarled: made rough by age or hard work

ominous: Threatening