Vocabulary Cards
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C2 adjective
obtrusive
目障りな
Meaning
noticeable in an unpleasant or unwelcome way; intrusive
Example
The advertisement was so obtrusive that it ruined the user’s experience.
C1 adjective
Obtuse
鈍い; 理解が遅い; 愚か
Meaning
annoyingly insensitive or slow to understand; lacking in intelligence or perception
Example
He was being deliberately obtuse about the instructions.
C2 verb
obvert
反転する
Meaning
To turn something so as to face in a different direction; in logic, to convert a proposition by negating both subject and predicate.
Example
The teacher asked the students to obvert the statement for practice.
C2 verb
obviate
排除する
Meaning
To remove a need or difficulty; to prevent or avoid something.
Example
This new system obviates the need for manual data entry.
A2 adjective
Obvious
明白な; 簡単に理解できる
Meaning
easily perceived or understood; clear and apparent to the mind
Example
It was obvious that she was upset about something.
A2 adverb
obviously
明らかに
Meaning
in a way that is easily perceived or understood; clearly
Example
Obviously, he didn’t read the instructions.
B1 noun
Occasion
機会; 特別な出来事
Meaning
a particular time or instance of an event; a special celebration
Example
Their wedding was a joyous occasion.
B1 adjective
Occasional
偶然の
Meaning
occurring infrequently or irregularly; happening from time to time
Example
She enjoys occasional walks in the park.
B1 adverb
Occasionally
時々; たまに;
Meaning
sometimes; from time to time; not regularly
Example
I occasionally visit my grandmother on weekends.
C2 noun
occident
西洋
Meaning
The countries of the West, especially Europe and America.
Example
The Occident has a long history of philosophical thought.
C2 verb
occlude
閉塞する
Meaning
To block or close up an opening or passage.
Example
The pipe was occluded by mineral deposits.
C1 adjective
occult
オカルト
Meaning
Relating to mysterious, supernatural, or magical powers and practices.
Example
She had always been fascinated by the occult and its hidden knowledge.
B2 noun
occupant
乗客
Meaning
A person who resides in or is present in a house, vehicle, seat, or place.
Example
The car had three occupants at the time of the accident.
B1 noun
Occupation
職業; 仕事; 占領
Meaning
a job or profession; the action of taking control of a place
Example
Teaching is her chosen occupation.
B2 adjective; verb (past participle)
occupied
使用中の；占領された
Meaning
being in use or taken; filled or lived in; controlled or held by force
Example
The room is occupied, so please wait outside.
B2 verb
occupy
占める / 占有する / 居住する
Meaning
to take up space or time; to live or work in a place
Example
The new family will occupy the house next month.
B1 verb
occur
発生する
Meaning
to happen or take place; to be found or present
Example
The accident occurred at the intersection during rush hour.
C1 noun
Occurrence
出来事
Meaning
an instance or event of something happening; the fact of occurring
Example
The occurrence of earthquakes is common in this region.
B1 verb
occurs
起こる
Meaning
Happens or takes place, especially as a result of something.
Example
Snowfall occurs in regions with freezing temperatures.
A2 noun
ocean
海洋
Meaning
A very large expanse of sea, especially the main areas of sea between continents.
Example
The ocean covers more than 70% of the Earth's surface.
C1 noun
ocean acidification
海洋酸性化
Meaning
The ongoing decrease in the pH of the Earth's oceans, caused by the absorption of carbon dioxide from the atmosphere.
Example
Ocean acidification is caused by atmospheric CO2 absorption.
C2 noun
ocean stratification
海洋の成層
Meaning
The formation of layers in ocean water due to differences in density.
Example
Ocean stratification affects marine biodiversity.
C1 noun
octagon
八角形
Meaning
A polygon with eight sides and eight angles.
Example
The stop sign is shaped like an octagon.
C1 noun
octave
Meaning
A series of eight musical notes, or the interval between one musical pitch and another with double its frequency.
Example
The singer's voice could easily reach the higher octave.