The Welsh word for Toxic is: Gwenwynig
"Gaz" is the Welsh word for gas.
The only case where a Welsh word would begin with ph is if it were mutated as ineu phen. That is called a spirant mutation.
The signal word "WARNING" is used to indicate that a material is moderately toxic.
Toxic.
The runoff from the mine was toxic.Toxic fumes filled the air after the tanker overturned.His anger became toxic.
The word 'fern' is not a Welsh word and has no meaning. The Welsh word for 'a fern' is 'rhedynen'.
The Welsh word for mum is mam.The Welsh word for dad is dad.
The Welsh word for 'decibel' is desibel.
The Welsh word for Excellent is ardderchog, it is also the welsh for fantastic.
The Welsh word for planet is 'planed' (plural - planedau)
The Welsh word for thunder is "taranu."
The Welsh word for 'landowner' is 'tirfeddiannwr'.
the welsh word for trust is 'ymddiried'
The Welsh word for 'phoenix' is ffenics.
The Welsh word for Epiphany is Ystwyll.
The Welsh word for 'a cave' is ogof.
The Welsh word for 'rectangle' is petryal.