A hard, white structure found in the mouths of vertebrates (excluding birds), arranged in two rows, that is essential for chewing food and playing a key role in forming speech sounds in humans. It consists of a crown and root, with various materials like enamel and dentin surrounding the core known as the dental pulp.
The serrated or notched edges found on the periphery of tools and mechanisms, which are critical for their specific functions, such as those seen on a saw or a comb.
The flat wooden pieces attached to the underside of traditional Japanese footwear known as geta, which help provide elevation and stability.
The cutting edge of a saw, which is designed to slice through materials.
The interlocking, jagged sections of gears that mesh together to transmit motion in machinery.
A unit of measure in photographic typesetting, equivalent to one-quarter millimeter, used to specify the distance between characters or lines of text.
Example:
その赤ちゃんはが生えはじめている。
A type of tooth located at the back of the mouth, primarily used for grinding food, commonly referred to as molars in English.
A colloquial term for the teeth that exert significant force during chewing, often associated with the deeper parts of the mouth, in contrast to the front teeth.
Example:
左上の奥歯が痛みます。
A component designed with a series of interlocking teeth that enables the transfer of motion and power between different mechanical parts. It is often used in machinery to facilitate movement and operations through precise engagement with other gears.
A metaphorical representation of an element within a larger system or organization, emphasizing its role in contributing to overall functionality, often used to describe individuals fulfilling predetermined roles within a corporate structure.
A term highlighting the interconnectedness of parts within a mechanism or system, underscoring the importance of each cog in maintaining harmony and efficiency, akin to a crucial part that ensures everything runs smoothly together.
Example:
歯車がかみ合っている。
A device or mechanism designed to prevent the rotation of wheels, often used in vehicles to enhance safety and control.
An item placed against the wheels of a parked vehicle to ensure it remains stationary, especially on an incline.
A method or measure employed to halt or restrict the escalation of a situation, often used in contexts such as economic conditions or social issues.
Example:
下院議員は支出に歯止めをかけると言いました。
To confront someone with hostility or aggression, often signifying a challenge to authority or power.
To take a stand against a stronger force, expressing defiance or opposition, particularly in situations of conflict.
To actively resist or counteract, often implying a sense of rebellion or rejection of control from a higher authority.
Example:
ウサギでさえ、いじめられて片隅に追いつめられると、刃向かってくるだろう。