using or knowing two languages
This study joins a heap of others suggesting that there are cognitive advantages to being
.Economist (May 28, 2015)
bi (two, twice, double) + lingua (tongue, language) + al (suffix forming adjectives)
According to the studies, two mental advantages of being bilingual are: 1) better focus and planning of complex tasks; 2) higher ability to understand others' minds. While bilingualism is seen as a useful skill nowadays, its roots used to suggest that a speaker was lying, being hypocritical, or mixing up words from different languages.
affecting or undertaken by two parties
bi (two, twice, double) + latus (side) + al (suffix forming adjectives)
The example sentence uses the adjective in a figurative way. A definition that connects more literally to the roots is "having identical parts on each side of an axis"--this can describe the symmetry between two sides of an object or organism, such as a plane's wings or a human's ears.
supported by both sides
Criminal justice reform has attracted some
support in the usually divided Congress.Reuters (Sep 22, 2015)
bi (two, twice, double) + parte (part, party) + an (suffix forming adjectives)
In American politics, the adjective usually refers to agreement between Democrats and Republicans. But a partisan can be any enthusiastic supporter of a person, party, cause, or activity, and in some cases, a warlike mentality is suggested (a partisan can also be "a pike with a long tapering blade with lateral projections").
composed of two legislative bodies
If Congress is pleased with itself for reaching a bipartisan,
deal, it’s probably time to adjust its expectations and aim a little higher.MSNBC (Dec 10, 2014)
bi (two, twice, double) + camera (chamber) + al (suffix forming adjectives)
In American politics, the adjective usually refers to Congress, which is composed of both the House of Representatives and the Senate. In anatomy, the adjective can describe a fish's heart, while mammals' hearts, which are divided into four chambers, are quadricameral.
divided into or made up of two parts
And I think that’s why life has begun to feel so disjointed and different and
and uncertain.Forbes (Mar 1, 2013)
bi (two, twice, double) + furca (fork) + ate (suffix forming verbs)
As the roots show, the word originated as a verb, but it is often used as a participial adjective to describe something that has been divided into two parts. As the example sentence suggests, it usually carries a negative tone of conflict or disagreement (in the past, a fork was a weapon or a stake of the gallows).
cut in half or cut in two
Anyway, once the games begin, every pitch is
and dissected; they parse out every last detail of every four-seam fastball.Washington Post (Oct 18, 2015)
bi (two, twice, double) + secare (to cut)
"Bisect," "dissect," and "parse" are nearly synonymous verbs. "Dis" is a prefix that means "apart" but it is related to the Latin words "bis" which means "twice" and "duo" which means "two." "Parse" comes from the Old French plural of "part" and usually refers to the grammatical analysis of the parts of a sentence.
of or relating to manic depressive illness
disorder, also known as manic-depressive illness, leads to dramatic mood swings or shifts in energy and activity levels.US News (Sep 18, 2015)
bi (two, twice, double) + polus (an end of an axis) + ar (suffix forming adjectives)
Geographically, the earth can be described as bipolar, because it has a North and South Pole. Anything with two extreme points or two tendencies or characteristics that are directly opposite can also be described as bipolar. But nowadays, the adjective is most commonly used to describe people suffering from a mental disorder.
having two spouses at the same time
bi (two, twice, double) + gamos (marrying) + y (suffix forming abstract or collective nouns)
As the example sentence suggests, bigamy and polygamy are often seen as equally illegal. But a serial monogamist can also be considered a polygamist (since he marries often and creates many children and households in need of support), but he is not guilty of bigamy or polygyny, which is marriage to two or more women at the same time.
an optical instrument for simultaneous use by both eyes
bi (two, twice, double) + oculus (eye) + ar (suffix forming adjectives)
As the roots show, the word originated as an adjective to describe something with two eyes or that requires the use of two eyes. Before the addition of the "s" turned it into a noun, the optical instrument was called "binocular glass" or "binocle."
occurring every second year
It found that younger women through age 54 benefit more from annual screening than
screening.Reuters (Oct 20, 2015)
bi (two, twice, double) + annus (year) + al (suffix forming adjectives)
Although the roots of "biennial" and "biannual" are the same, their meanings are not. Something that is biannual occurs twice a year, while something that's biennial occurs every two years. In botany, a biennial is a plant that lasts two seasons, unlike a perennial, which can last several seasons and often for more than two years.