ふとfutoi
1.

Describing the considerable width or diameter of an object, particularly when it is noticeably larger than what is common or expected, such as in the case of pipes, columns, or cords.

2.

Conveying a sense of strength and stability, suggesting resilience and a robust presence that does not easily yield to external pressures or challenges, reflected in both physical attributes and character traits.

3.

Referring to low, rich vocal qualities that carry a significant presence, often associated with a powerful or resonant sound.

4.

Indicative of a bold or audacious demeanor, suggesting a lack of hesitation or concern about minor details, often used in a figurative sense to describe someone who is either shameless or exceptionally brave.

5.

Characterizing a body type that is well-fed or robust, often implying good health and a strong physical build.

Example:

彼は太い首をしている。

ずぶと図太zubutoi
1.

Describes a person who remains unfazed by the opinions or reactions of others, displaying a sense of calmness and confidence in situations that might make others feel uneasy.

2.

Characterizes an individual who behaves in a daring or audacious manner, often disregarding social norms or expectations, and carries a certain level of arrogance in their actions.

3.

Refers to someone who demonstrates a lack of shame or embarrassment, often acting in a way that could be considered rude or inappropriate without concern for the consequences.

のぶと野太nobutoi
1.

Describing a person or characteristic that exhibits a boldness or audacity, often to the point of being unashamed or brazen in behavior or demeanor.

2.

Referring to a deep, resonant quality in voice, conveying strength and confidence.

3.

Indicating a ruggedness or toughness in nature or attitude, often characterized by a lack of subtlety or refinement.