Adolescence /ˌæd

gesture /ˈdʒes.tʃə r / /-tʃɚ/ noun [ C ] MOVEMENT
1. a movement of the hands, arms or head, etc. to express an idea or feeling
The prisoner raised his fist in a gesture of defiance as he was led out of the courtroom.
She made a rude gesture at the other driver.
gesture /ˈdʒes.tʃə r / /-tʃɚ/ noun [ C ] SYMBOLIC ACT
2. an action that you take which expresses your feelings or intentions, although it might have little practical effect The Government donated £500 000 as a gesture of goodwill.
Not having butter on his potatoes was his only gesture towards healthy eating.
hesitation /ˌhez.ɪˈteɪ.ʃ ə n/ noun [ C or U ]
when you pause before doing something, especially because you are nervous or not certain
After a slight hesitation, she began to speak.
Any hesitation on the part of the government will be seen as weakness.
formal I have no hesitation in recommend ing Ms Shapur for the job.
language /ˈlæŋ.gwɪdʒ/ noun [ C or U ]
a system of communication consisting of sounds, words and grammar, or the system of communication used by the people of a particular country or profession
She does research into how children acquire language.
Do you speak any foreign languages?"
I'm hopeless at learning languages.
the English language
legal/technical language
the language of business
Java and Perl are both important computer programming languages (= systems of writing instructions for computers) .
linguistic /lɪŋˈgwɪs.tɪk/ adjective
connected with language or the study of language
I'm particularly interested in the linguistic development of young children.
mother tongue noun [ C usually singular ]
the first language that you learn when you are a baby, rather than a language learned at school or as an adult
native speaker noun [ C ]
someone who has spoken a particular language since they were a baby, rather than having learnt it as a child or adult
All our teachers are native speakers of English. a native-speaker dictionary
pronunciation /prəˌnʌn t  .siˈeɪ.ʃ ə n/ noun [ C or U ]
how words are pronounced
English pronunciation is notoriously difficult.
There are two different pronunciations of this word.
sign language noun [ C ]
a system of hand and body movements representing words, which is used by and to people who cannot hear or talk, or the movements which people sometimes make when talking to someone whose language they do not speak