Something that is ostensible appears to be true or is officially declared to be true but is really a cover for the actual truth of a situation.
If someone is being obsequious, they are trying so hard to please someone that they lack sincerity in their actions towards that person.
If something obtrudes, it becomes noticeable or attracts attention in a way that is not pleasant or welcome.
If someone acts in an unobtrusive way, their actions are not easily noticed and do not stand out in any way.
If someone is objective, they base their opinions on facts rather than personal feelings or beliefs.
An obstinate person refuses to change their mind, even when other people think they are being highly unreasonable.
If you describe an action as ostentatious, you think it is an extreme and exaggerated way of impressing people.
Someone who is obliging is very helpful towards other people, being eager to do them favors or offer them assistance.
When you observe something, you watch it carefully to see what is happening.
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