Askance - an attitude or look of suspicion
Equanimity - mental calmness, composure
Ominous - giving the impression that something bad or unpleasant is going to happen.
Superfluous - unnecessary or too much.
Benevolent - well meaning and kindly.
Insuperable - impossible to overcome.
Germane - relevant to a subject under consideration.
Nebulous - hazy and unclear.
Turnkey - already built and ready for the end user to use right away.
Append - to add or attach.
Inveterate - long established and unlikely to change.
Alacrity - cheerful readiness.
Despondent - in low spirits from loss of hope or courage.
Pervasive - spreading widely throughout an area or a group of people.
Deification - the worshiping or treating of someone or something as a god.
Rumination - a deep or considered thought about something.
Fervor - intense and passionate feeling.
Bespoke - made for a particular customer or user. (Custom-made)
Circumspect - wary and unwilling to take risks.
Fastidious - very attentive to and concerned about accuracy and detail.
Pugilistic - the skill, practice, and sport of fighting with the fists; boxing.
Vernacular - the language or dialect spoken by the ordinary people in a particular country or region.
Eccentricity - unusual or odd behavior.
Dexterity - skill in performing tasks.
Germline - a series of germ cells each descended or developed from earlier cells in the series, regarded as continuing through successive generations of an organism.
Augment - make something greater by adding to it.
Colloquial - used in ordinary or familiar conversation.
Precipice - a very steep rock face or cliff.
Insidious - proceeding in a gradual, subtle way, but with harmful effects.
Envisage - contemplate or conceive of as a possibility or a desirable future event.
Ominous - giving the impression that something bad or unpleasant is going to happen.
Opacity - the condition of lacking transparency.
Abscond - leave hurriedly and secretly, typically to avoid detection.
Chagrin - distress or embarrassment at having failed or been humiliated.
Innocuous - not harmful or offensive.
Disingenuous - not straightforward or sincere, typically by pretending that one knows less about something than one really does.
Gaiety - the state or quality of being lighthearted or cheerful.
Melancholy - a feeling of pensive sadness, typically with no obvious cause.
Pensive - engaged in, involving, or reflecting deep or serious thought.
Anguish - severe mental or physical pain or suffering.
Succor - assistance and support in times of hardship and distress.
Perilous - full of danger or risk.
Vigilant - keeping careful watch for possible danger or difficulties.
Hegemon - political, economic, or military predominance or control of one state over the others.