bystro znamená v Angličtina

fast▼adverb
with great speed

pronto▼adverb
quickly

quickly▼adverb
rapidly, fast

keenness▼

swiftness▼

acumen▼noun
quickness of perception

astuteness▼noun
quality of being astute, also cleverness

ingenuity▼noun
ability to come up with solutions to difficult problems