living conditions [a]
- rau°
- hart
effort [a]
- schwer
- schwierig
- lästig
- drückend
- beschwerlich
- anstrengend
- mühselig
- schweißtreibend
food [a]
- zäh
character [a]
- zäh
material [a]
- zäh
durable [a]
- unverwüstlich
- strapazierfähig

living conditions [a]
- rude
- dur
- difficile
effort [a]
- ardu
- pénible
- lourd
- épuisant
- dur
- laborieux
food [a]
- dur
- coriace
- caoutchouteux
character [a]
- dur
- tenace
material [a]
- dur
durable [a]
- résistant
- durable

living conditions [a]
- duro
- difficile
effort [a]
- arduo
- difficile
- strenuo
- duro
food [a]
- duro
- stopposo
- tiglioso
character [a]
- forte
material [a]
- duro
- forte
durable [a]
- resistente
- che dura
- indistruttibile

living conditions [a]
- difícil
- duro
effort [a]
- arduo
- penoso
- trabajoso
- laborioso
- dificultoso
- difícil
food [a]
- duro
- estropajoso
character [a]
- duro
- fuerte
material [a]
- duro
- resistente
durable [a]
- duradero
- resistente
- fuerte

living conditions [a]
- ruw
- hard
effort [a]
- lastig
- moeilijk
- zwaar
- hard
- veeleisend
- vermoeiend
food [a]
- taai
character [a]
- taai
- gehard
material [a]
- taai
- sterk
durable [a]
- duurzaam
- deugdelijk
- solide
- onverslijtbaar

living conditions [a]
- hård
- tuff
effort [a]
- svår
- mödosam
- besvärlig
- betungande
- hård
- tryckande
food [a]
- seg
- träig
character [a]
- hård
- hårdhudad
material [a]
- seg
- stark
durable [a]
- slitstark
- hållbar

living conditions [a]
- difícil
- duro
effort [a]
- árduo
- duro
- pesado
- difícil
- trabalhoso
- laborioso
food [a]
- duro
character [a]
- forte
material [a]
- resistente
- forte
durable [a]
- durável
- duradouro
- de uso diário
- resistente
- imperecível

quality [a]
- durable
- sturdy
- hardy
characteristic [a]
- strong
- firm
- rugged
- hard
- vigourous
- hardy
characteristic [a]
- hardened
- rigid
- inflexible
- unyielding
- uncompromising
- hard-line
- incorrigible
- troublesome
property [a]
- violent
- severe
- savage
- terrible
- ferocious
- fierce
- vigourous
person [n]
- hoodlum
- bruiser
- gangster

Present participle; Past participle
- toughing
- toughed
Present
- tough
- tough
- toughs
- tough
- tough
- tough
Past
- toughed
- toughed
- toughed
- toughed
- toughed
- toughed
Future
- will tough
- will tough
- will tough
- will tough
- will tough
- will tough
Present conditional
- would tough
- would tough
- would tough
- would tough
- would tough
- would tough
Present Perfect
- have toughed
- have toughed
- has toughed
- have toughed
- have toughed
- have toughed
Past Perfect
- had toughed
- had toughed
- had toughed
- had toughed
- had toughed
- had toughed
Future Perfect
- will have toughed
- will have toughed
- will have toughed
- will have toughed
- will have toughed
- will have toughed
Past conditional
- would have toughed
- would have toughed
- would have toughed
- would have toughed
- would have toughed
- would have toughed
Imperative
- -
- tough
- -
- -
- -
- -