subtle

01. There is a [subtle] difference in meaning between the two words that is difficult to explain.

02. His sense of humor is quite [subtle], so sometimes it's hard to know if he is joking or if he's serious.

03. Her novels have a common theme which is often quite [subtle], but is nonetheless important to the outcome of the story.

04. This premium wine has [subtle] tastes of chocolate and cherries that make it quite special.

05. Books that are translated often lose the [subtleties] of language which are present in the original.

06. Thoreau once remarked that we perceive, and are affected by changes too [subtle] to be described.

07. There is a Congolese proverb which states that a little [subtlety] is better than a lot of force.

08. The Monarch butterfly can discern tastes 12,000 times more [subtle] than those perceivable by human taste buds.

09. Karl Marx believed that the dominant few encourage religious faith among the masses as a [subtle] tool in the process of economic exploitation.

10. The [subtle] humor of the film, combined with the real tenderness between the characters, make it one of the best movies of the year.

11. The qualities that make a Stradivarius violin superior to fine modern violins are so [subtle] that the average listener cannot detect them.

12. Research shows that there is a small number of individuals who experience great difficulties in learning foreign languages because they may have some [subtle] processing difficulties in their native language.

13. Louis Pasteur once observed that science advances through tentative answers to a series of more and more [subtle] questions which reach deeper and deeper into the essence of natural phenomena.

14. Seasonal temperature changes are more [subtle] near the equator than they are in other areas.

15. In Burundi, whispered singing is a technique of singing quietly enough to allow for the [subtle] sounds of the traditional instruments to be clearly heard.

16. Doctors warn that many of the symptoms of diabetes can be so [subtle] that they often go ignored for 10-15 years.

17. Many problems are caused by the [subtle] modification of a river system as a result of urbanization.

18. Hot water created by factories is a very [subtle] type of liquid pollutant.