脅威【きょうい】
threat, menace
権威【けんい】
authority, power, influence, prestige, (an) authority (on), expert
威信【いしん】
prestige, dignity
威嚇【いかく】
threat, intimidation, menace
威勢【いせい】
power, might, authority, influence, spirits, vigor, vigour, energy, boldness
威厳【いげん】
dignity, majesty, solemnity, gravity
威張る【いばる】
to put on airs, to act big, to throw one's weight about, to be overbearing, to be domineering, to be bossy, to be pushy, to be proud, to be haughty, to be arrogant, to swagger, to boast, to brag