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When you have ardor for something, you have an intense feeling of love, excitement, and admiration for it.
An assiduous person works hard to ensure that something is done properly and completely.
If you describe a person, group, or civilization as effete, you mean it is weak, exhausted, powerless, unproductive, and/or corrupt.
Someone who has a haggard appearance looks very tired, worn, thin, and exhausted.
Something that is immutable is always the same and cannot be changed.
Something that is incessant continues on for a long time without stopping.
Something that is interminable continues for a very long time in a boring or annoying way.
Something that happens on an intermittent basis happens in irregular intervals, stopping and starting at unpredictable times.
Someone who is irresolute is unable to decide what to do.
If you are lethargic, you are tired, lack energy, and are unwilling to exert effort.
When you are listless, you lack energy and interest and are unwilling to exert any effort.
An obstinate person refuses to change their mind, even when other people think they are being highly unreasonable.
If someone is pallid, they look very pale in an unattractive and unhealthy way.
Someone who is pertinacious is determined to continue doing something rather than giving up—even when it gets very difficult.
Someone who is phlegmatic stays calm and unemotional even in dangerous or exciting situations.
To be punctilious is to pay precise attention to detail.
If someone watches or listens to something with rapt attention, they are so involved with it that they do not notice anything else.
A feeling of resignation is one of accepting something that you really don’t want to do.
Someone who is sedulous works hard and performs tasks very carefully and thoroughly, not stopping their work until it is completely accomplished.
Stasis is a state of little change over a long period of time, or a condition of inactivity caused by an equal balance of opposing forces.
If you are steadfast, you have a firm belief in your actions or opinions and refuse to give up or change them because you are certain that you are doing the right thing.
If you are suffering from tedium, you are bored.
A tenacious person does not quit until they finish what they’ve started.
If your body is affected by torpor, you are severely lacking in energy; therefore, you are idle—and can even be numb.
If you are unflagging while doing a task, you are untiring when working upon it and do not stop until it is finished.
If you are unrelenting in your desire to do something, you stop at nothing until you’ve done it.
A thing or person that is unremitting is persistent and enduring in what is being done.
When you have a vehement feeling about something, you feel very strongly or intensely about it.
Someone who possesses vigor has energy, strength, and power.
A wastrel is a lazy person who wastes time and money.
Someone who is zealous spends a lot of time, energy, and effort to support something— notably that of a political or religious nature—because they believe in it very strongly.
Adj.
indefatigable
in-di-FAT-i-guh-buhl
Context
My sister is indefatigable or tireless in her efforts on behalf of the homeless. She volunteers at the shelter everyday and writes to her senator constantly with an indefatigable, endless determination. She never seems to tire of coming up with new ways to help. She is an indefatigable, energetic, and highly active defender of the rights of those who are in need.
Quiz:Try again!
How does an indefatigable person do something?
They delegate the responsibility to someone else.
They seem able to do it without losing any energy.
They show effort—but not enough to complete the task.
Big, Fat, and Undependable Don't tell me that a big, fat, and undependable soccer player will be indefatigable! How could he move that much weight around the field without getting exhausted?
Examples
The indefatigable pursuit of an unattainable perfection—even though nothing more than the pounding of an old piano—is what alone gives a meaning to our life on this unavailing star.
— Logan Pearsall Smith, American-born British writer, from _Afterthoughts_
The indefatigable Guggenheim, which already operates branches in Berlin and Venice, has plans for a $687 million building at the southern tip of Manhattan and is also casting its eyes on Brazil.
—
Newsweek
Perhaps one of the most striking impressions one takes from _My Life in France_ is of [Julia] Child’s indefatigable attention to detail and insistence on an exact, careful approach to cooking. She would investigate ingredients to learn all she could about them, and test and retest recipes for as long as it took to get them just right.
—
The Christian Science Monitor
Bethe worked into his 90s at Cornell University’s Newman Laboratory of Nuclear Studies, devoting many solitary afternoons to his passion: numbers. . . . Bethe’s indefatigable aura earned him the nickname of "The Battleship" at Los Alamos, the laboratory in New Mexico where the atomic bomb was developed.
—
Sarasota Herald-Tribune
