1. Mentally or physically infirm with age.
5. (Irish) Mother of the ancient Irish gods.
8. The compass point that is one point south of due east.
11. Any culture medium that uses agar as the gelling agent.
12. A river in north central Switzerland that runs northeast into the Rhine.
13. Resinlike substance secreted by certain lac insects.
14. A cloud of fine particles suspended in a gas.
15. Support resembling the rib of an animal.
16. A master's degree in business.
17. Extremely pleasing.
20. A public promotion of some product or service.
21. A Turkish unit of weight equal to about 2.75 pounds.
23. A young woman making her debut into society.
24. West Indian tree having racemes of fragrant white flowers and yielding a durable timber and resinous juice.
27. The elementary stages of any subject (usually plural).
28. A logarithmic unit of sound intensity.
29. In the Arabian Nights a hero who tells of the fantastic adventures he had in his voyages.
32. Scarabaeid beetle considered divine by ancient Egyptians.
36. A member of an agricultural people of southern India.
41. (Babylonian) God of wisdom and agriculture and patron of scribes and schools.
42. A loose sleeveless outer garment made from aba cloth.
43. A particular geographical region of indefinite boundary (usually serving some special purpose or distinguished by its people or culture or geography).
46. Any of various dark heavy viscid substances obtained as a residue.
47. The elementary stages of any subject (usually plural).
48. An unofficial association of people or groups.
49. Electronic warfare undertaken under direct control of an operational commander to locate sources of radiated electromagnetic energy for the purpose of immediate threat recognition.
50. Towards the side away from the wind.
51. In bed.
52. A unit of length of thread or yarn.

1. A spar rising aft from a mast to support the head of a quadrilateral fore-and-aft sail.
2. Largest known toad species.
3. Gay or light-hearted recreational activity for diversion or amusement.
4. A unit of surface area equal to 100 square meters.
5. A river in north central Switzerland that runs northeast into the Rhine.
6. Submerged aquatic plant having narrow leaves and small flowers.
7. Someone who engages in arbitrage (who purchases securities in one market for immediate resale in another in the hope of profiting from the price differential).
8. Any of various trees of the genus Ulmus.
9. A small cake leavened with yeast.
10. Any of a number of fishes of the family Carangidae.
18. A sock with a separation for the big toe.
19. A large Yoruba city in southwestern Nigeria.
22. Boiled or baked buckwheat.
25. The blood group whose red cells carry both the A and B antigens.
26. An associate degree in nursing.
30. A bachelor's degree in science.
31. A radioactive element of the actinide series.
33. Nocturnal badger-like carnivore of wooded regions of Africa and southern Asia.
34. Lower in esteem.
35. A mountainous republic in southeastern Asia on the Bay of Bengal.
37. A French abbot.
38. Small European freshwater fish with a slender bluish-green body.
39. An amino acid that is found in the central nervous system.
40. An Arabic speaking person who lives in Arabia or North Africa.
44. The compass point midway between northeast and east.
45. A condition (mostly in boys) characterized by behavioral and learning disorders.