testi-, test-

(Latin: a witness, one who stands by)

testify
1. To make a factual statement based on personal experience or to declare something to be true from personal experience.
2. To bear witness; to give evidence as a witness; to make a solemn declaration, under oath or affirmation, in a judicial inquiry, for the purpose of establishing or proving some fact.
Testimonia ponderanda sunt, non numeranda. (Latin proverb)
Translation: "Evidence is to be weighed, not enumerated."
testimonial
A statement backing up a claim or supporting a fact.
testimony (s) (noun), testimonies (pl)
1. Evidence given by a competent witness under oath or affirmation in a court of law; as distinguished from evidence derived from writings, and other sources.
2. Something that supports a fact or a claim.
3. A public profession of Christian faith or religious experience.

It is stated that under Roman law no man was admissible as a witness unless there was evidence or “witnesses” of one’s virility because only verified men were allowed to give witness, or to testify, in legal matters.

In common legal parlance, testimony and "evidence" are synonymous.

Testimony properly means only such evidence as is delivered by a witness on the trial of a cause either orally or in the form of affidavits or depositions.

testimonyl
1. Evidence that a witness gives to a court of law.
2. Something that supports a fact or a claim.
testis
A witness.

One who gives evidence in court, or who witnesses a document. A testimony consists of evidence given by a competent witness under oath or affirmation; as distinguished from evidence derived from writings, and other sources.

In common parlance, "testimony" and "evidence" are synonymous. Testimony properly means only such evidence as is delivered by a witness on the trial of a cause, either orally or in the form of affidavits or depositions.

testis (s), testes (pl)
1. In law, a witness; one who gives evidence in court, or who witnesses a document; witnesses.
2. In medicine, either of the paired male reproductive glands, roundish in shape, that produce sperm and male sex hormones, and hang in a small sac (scrotum).
3. The male gonad or testicle that is one of two reproductive glands located in the scrotum that produces the male reproductive cells (spermatozoa) and the male hormones testosterone and inhibin.

From Latin, “a witness” because it “bears witness” to a man’s virility.

A legal definition: A witness; one who gives evidence in court, or who witnesses a document.

Testis de visu preponderat aliis.
An eye-witness is preferred to others.

A legal maxim about testimony.

Testis lupanaris sufficit ad factum in lupanari.
A lewd person is a sufficient witness to an act committed in a brothel.

A maxim about the legality of testimony.

Testis nemo in sua causa esse potest
No one can be a witness in his own cause.
Testis oculatus unus plus valet quam auriti decem
In law, “One eye-witness is worth more than ten ear-witnesses.”
testis unus, testis nullus
One witness, no witness: According to this law-principle statement, testis unus, testis nullus is unsupported testimony and so it is no better than the complete absence of testimony; so, we should not give any trust to a story we hear from just one source.
Testmoignes ne poent testifier le negative, mes l'affirmative
Translation: Witnesses cannot testify to a negative; they must testify to an affirmative.
testoid
Resembling a testis.
testopathy
Any disease of the testes.