Pronunciation: (strengk'thun, streng'-, stren'-), [key]
1. to make stronger; give strength to.
2. Phonet.to change (a speech sound) to an articulation requiring more effort, as from fricative to stop or nongeminate to geminate.
to gain strength; grow stronger.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.