Iron-deficiency anemia can cause fatigue (tiredness), shortness of breath, chest pain, and other symptoms. Severe iron-deficiency anemia can lead to heart problems, infections, problems with growth and development in children, and other complications.
Semantics is the study of meaning. It is a wide subject within the general study of language. An understanding of semantics is essential to the study of language acquisition (how language users acquire a sense of meaning, as speakers and writers, listeners and readers) and of language change (how meanings alter over time).
Semantics is the study of meaning in language. It can be applied to entire texts or to single words. For example, destination and last stop technically mean the same thing, but students of semantics analyze their subtle shades of meaning. To correctly pronounce semantics â which is a singular noun even though it ends in s â accent the second syllable: suh-MAN-ticks..