Some of their neighbours interchanged glances, and one of them─one of the ill-bred people whom one does meet abroad─leant forward over the table and actually intruded into their argument.
1. intrude [ɪnˋtrud] (v.) to become involved in a situation in a way that is not welcome to other people, for example by getting involved in their private lives
Example: I was very concerned about her but I didn't want to intrude.
Example: Civil Rights campaigners say the new laws will intrude on people's personal freedom.
(v.) to enter a place where you are not allowed to go
Example: One of their planes intruded into our airspace.
intruder (n.) someone who enters a place where they are not allowed to go, especially to commit a crime
Example: The dog scared off intruders who had tried to break into the house.
(n.) someone who becomes involved in a situation in which they are not welcome
Example: I don't belong here. I feel like an intruder.
intrusion (n.) something that interrupts a peaceful situation or a private event
Example: It's so quiet here that the occasional distant noise is the only intrusion.
(n.) the act of becoming involved in something in a way that is not welcome
Example: How do you deal with the constant intrusions of the media?
Example: This is another example of government intrusion into football.
intrusive (adj.) interrupting a peaceful situation
Example: intrusive noise/ lights/ tourists
(adj.) becoming involved in something in a way that is not welcome
Example: I found their question quite intrusive.
He didn't look at the ladies as he spoke, but his voice was perplexed and sorrowful.
2. perplex [pɚˋplɛks] (v.) to make someone feel perplexed
perplexed (adj.) confused because you cannot understand something: bewildered
Example: ‘ What's the matter?’ Rob said, looking totally perplexed.
perplexing (adj.) confusing
perplexity [pɚˋplɛksɪtɪ] (n.) a confused feeling because you cannot understand something: confusion
Example: They stared in perplexity at the map.
(n.) [ usually plural ] something that makes a subject or situation difficult to understand
Example: the perplexities of human biology
〝No harm, of course. But we could not be under an obligation.〞
3. obligation (n.) a grateful feeling that you have towards someone who has done something for you
Example: She felt a certain obligation towards him because of everything he had done for her in the past.
Example: Emma felt a tremendous sense of obligation towards her sister.
(n.) something that you must to do for legal or moral reasons
Example: The company have an obligation to its customers.
Example: Estimates are availabe on request, without obligation.
under an obligation 1 forced to do something for legal or moral reasons
Example: Our client is under no obligation to accept your offer.
Example: Local authorities should be placed under an obligation to complete the work.
2 feeling grateful towards someone who has done something for you
Example: I just don't want to be under an obligation to him.
obligatory [əˋblɪgə͵torɪ] (adj.) [ formal ] something that is obligatory must be done in order to obey a law or rule: compulsory, mandatory
Example: It is obligatory for members to be insured.
obligated [ˋɑblɪgetɪd] (adj.) [ formal ] be/ feel obligated to do sth if you are obligated to do something, you must do it because it is your duty or it is morally right
Example: The committee are then obligated to take any comments into consideration.
be/ feel obligated to sb to feel that you owe someone something because of what they have done for you
oblige [əˋblaɪdʒ] (v.) [ usually passive ] [ formal ] to force someone to do something because it is the law, a rule, or a duty
Example: Employers are legally obliged to pay the minimum wage.
(v.) to help someone by doing something that they have asked you to do
Example: If there's anything else I can do, I'm always happy to oblige.
obliging [əˋblaɪdʒɪŋ] (adj.) willing to help someone
Example: An obliging porter carried our bags to our room.
4. compulsory [kəmˋpʌlsərɪ] something that is compulsory must be done because of a rule or law
Example: School uniform is no longer compulsory in many British schools.
5. mandatory [ˋmændə͵torɪ] (adj.) ordered by a law or rule
Example: A new accounting system will soon become mandatory for all departments.
Example: It's mandatory to wear a seat belt in the UK.