4000 Duolingo Vocabulary List

nghĩa vụ act of binding oneself by a social, legal, or moral tie; written promise to repay a debt

đôi khi random; occurring from time to time; infrequent

ma tuý the addictive drug, such as opium that reduces pain, alters mood and behavior; inducing sleep

niken a coin worth one-twentieth of a dollar

nicotine an alkaloid poison that occurs in tobacco

tự nhiên biologist knowledgeable about natural history

cảnh decorative; any plant grown for its beauty or ornamental value

du mục leading a wandering life with no fixed abode; changeable; unsettled

đục impenetrable by light; not transparent; not reflecting light; having no luster

tối ưu most advantageous; optimum; ideal

tiêu diệt destroy completely; do away with completely so as to leave no trace

gọn gàng clean or orderly; tidy, with everything in its place

opera a drama set to music and consists of singing

quặng a mineral that contains metal that is valuable enough to be mined

Tiêu chuẩn convention; standard; rule

bắt buộc morally or legally constraining; required; binding

nghĩa vụ act of binding oneself by a social, legal, or moral tie; written promise to repay a debt

tối ưu most favorable or advantageous

đối thủ contestant; someone who offers opposition

nicotine an alkaloid poison that occurs in tobacco

đối thủ contestant; someone who offers opposition

đôi khi random; occurring from time to time; infrequent

vi phạm act of causing anger, resentment, displeasure, or affront; violation or infraction of moral or social code

bất bạo động peaceful resistance by fasting or refusing to cooperate

chiếm inhabit;  live in a certain place; be present in; be inside of

null invalid; void; nullified; having no legal force; invalid

du mục leading a wandering life with no fixed abode; changeable; unsettled

khởi phát beginning or early stages; offensive against an enemy

lẻ not easily explained; beyond from the usual or expected; not divisible by two

Tiêu chuẩn convention; standard; rule

opera a drama set to music and consists of singing

du mục leading a wandering life with no fixed abode; changeable; unsettled

vi phạm act of causing anger, resentment, displeasure, or affront; violation or infraction of moral or social code

tự nhiên biologist knowledgeable about natural history

gọn gàng clean or orderly; tidy, with everything in its place

trang trí decoration; things added to something to provide decoration

con descendant; the young of an animal

đục impenetrable by light; not transparent; not reflecting light; having no luster

thâu thuế quá nặng heavily burden; tax above what is considered appropriate or just; tax too heavily

lấy get hold of; gain possession of; acquire, in any way