  We present here spatially-resolved optical spectroscopic observations of four
nearby dwarf Wolf-Rayet (WR) galaxies. The ages of the most recent starburst
events in these galaxies are found between 3 and 10 Myr. The gas-phase
metallicities [12+log(O/H)] for the spatially-resolved star-forming regions are
derived using several indicators. The star-forming regions within the galaxies
are found chemically homogeneous within the uncertainties in the estimates.
Nitrogen-enrichment as expected in the WR regions is not detected. This implies
that metal-enrichment due to supernovae explosions in the most recent
star-forming episode is not being detected here. It is suggested that the newly
synthesized metals still reside in hot gas-phase. The metals from the previous
episodes, cooled by now and well mixed across the whole extent of galaxies, are
making galaxies chemically homogeneous with normal N/O ratio. These galaxies
are residing in dense environments with galaxy density in the range of $8-80$
Mpc$^{-3}$.
