Ishaq, peace be upon him

معجم المصطلاحات الاسلامية - (ج 1 / ص 68)
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Ishaq, peace be upon him اسحق عليه السلام
Isaac. A prophet of Islam. He was the second son of the Prophet Ibrahim (Abraham), peace be on him. He was thirteen years younger than his brother, the Prophet Ismael (Ishmael), peace be on him. Mary, mother of Jesus, peace be on them, was descended from Ishaq. See Holy Qur' an, Al-An'am (6):84, As-Saffat (37):112-113. See Mursaleen .

Ijtihaad

معجم المصطلاحات الاسلامية - (ج 1 / ص 63)
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Ijtihaad: اجتهاد

Literally, striving and self-exertion; independent reasoning; analytical thought. Ijtihaad may involve the interpretation of the source materials, inference of rules from them, or giving a legal verdict or decision on any issue on which there is no specific guidance in the Qur'an and the Sunnah.

الحسد

Hasad Jealousy
Jealousy. Hasad is forbidden in Islam, except for two specific reasons:
Being jealous of a person for memorizing the Holy Qur'an by heart.
Being jealous of a wealthy person for expending his wealth in the path of Allah Ta'ala.

fasting

معجم المصطلاحات الاسلامية - (ج 1 / ص 46)
 صيام
Fasting, from food and drink - and from sexual intercourse if you are married during daylight, from the first light of dawn until sunset. Also spelled as Saum. Fasting in the month of Ramadan is one of the Arkan (five pillars) of Islam. Allah Ta' ala has made it obligatory on every Muslim whether man or woman, with the exception of:
A person who is ill.