Collins COBUILD Advanced Learner’s Dictionary

2 ADJ If a barrier or surface is unyielding , it is very solid or hard. [LITERARY ] □  …the troopers, who had to build roads through those unyielding mountains. □  He sat on the edge of an unyielding armchair, a cup of tea in his hand.

un|zip /ʌ nz I p/ (unzips , unzipping , unzipped )

1 VERB When you unzip something which is fastened by a zip or when it unzips , you open it by pulling open the zip. □ [V n] James unzipped his bag. □ [V ] This padded changing bag unzips to form a convenient and comfortable mat for nappy changing.

2 VERB To unzip a computer file means to open a file that has been compressed. [COMPUTING ] □ [V n] Unzip the icons into a sub-directory.

up

➊ PREPOSITION, ADVERB, AND ADJECTIVE USES

➋ USED IN COMBINATION AS A PREPOSITION

➌ VERB USES

➊ up ◆◆◆ The preposition is pronounced /ʌp/. The adverb and adjective are pronounced /ʌ p/. Up is often used with verbs of movement such as 'jump' and 'pull', and also in phrasal verbs such as 'give up' and 'wash up'. → Please look at category 22 to see if the expression you are looking for is shown under another headword.

1 PREP If a person or thing goes up something such as a slope, ladder, or chimney, they move away from the ground or to a higher position. □  They were climbing up a narrow mountain road. □  I ran up the stairs and saw Alison lying at the top. □  The heat disappears straight up the chimney. ● ADV [ADV after v] Up is also an adverb. □  Finally, after an hour, I went up to Jeremy's room. □  Intense balls of flame rose up into the sky. □  He put his hand up.

2 PREP If a person or thing is up something such as a ladder or a mountain, they are near the top of it. □  He was up a ladder sawing off the tops of his apple trees. □  The Newton Hotel is halfway up a steep hill. ● ADV [ADV after v] Up is also an adverb. □  …a research station perched 4000 metres up on the lip of the crater.

3 ADV [ADV after v] You use up to indicate that you are looking or facing in a direction that is away from the ground or towards a higher level. □  Paul answered, without looking up. □  Keep your head up, and look around you from time to time.

4 ADV [ADV after v] If someone stands up , they move so that they are standing. □  He stood up and went to the window. □  He got up and went out into the foyer.

5 PREP If you go or look up something such as a road or river, you go or look along it. If you are up a road or river, you are somewhere along it. □  A line of tanks came up the road from the city. □  We leaned on the wooden rail of the bridge and looked up the river. □  He had a relation who lived up the road.

6 ADV [ADV after v, be ADV ] If you are travelling to a particular place, you can say that you are going up to that place, especially if you are going towards the north or to a higher level of land. If you are already in such a place, you can say that you are up there. [mainly SPOKEN ] □  I'll be up to see you tomorrow. □  He was living up North. □  I live here now, but I've spent all my time up in Swaziland.

7 ADV [ADV after v] If you go up to something or someone, you move to the place where they are and stop there. □ [+ to ] The girl ran the rest of the way across the street and up to the car. □  On the way out a boy of about ten came up on roller skates. □ [+ to ] He brought me up to the bar and introduced me to Dave.