baけるkeru
1.

To change one's original appearance into a different, often unusual, form, particularly used in the context of supernatural beings like foxes or spirits taking on human shapes.

2.

To undergo a transformation that makes one seem entirely different, often associated with makeup or disguise, resulting in an appearance that significantly deviates from the usual.

3.

To experience a sudden and dramatic shift into a more favorable or unexpectedly successful state, such as an investment doubling in value or an athlete becoming renowned overnight.

4.

To metaphorically alter one's identity or situation, sometimes implying deception or a façade that conceals one's true self or circumstances.

Example:

猫は化けると言われる。

fuけるkerufuけるkeru
1.

To appear older than one's actual age, often due to physical changes or a mature demeanor that suggest an advanced age.

2.

To undergo changes associated with aging, resulting in a noticeable decline in youthfulness or vitality.

3.

To develop an older appearance, typically marked by characteristics that imply an aging process, regardless of chronological age.

Example:

気苦労で彼は急にふけた。