black oak: medium to large deciduous timber tree of the eastern United States and southeastern Canada having dark outer bark and yellow inner bark used for tanning; broad five-lobed leaves are bristle-tipped
tree: a tall perennial woody plant having a main trunk and branches forming a distinct elevated crown; includes both gymnosperms and angiosperms
sawm: the third pillar of Islam is fasting (primarily during the month of Ramadan); Muslims abstain from food and drink and gambling and all sensuous pleasures from sunrise to sunset during Ramadan